Converging Lens Lab Report

Written to provide the reader info and make me focused on your experiment. Lab report You must hand in a typed lab report for every lab you perform. CBSE Class 10 Science Lab Manual Focal Length of Concave Mirror and Convex Lens. cylindrical lens on the ray table. If there are defects in the manufacture of the lenses, that should be revealed by any difficulties experienced in trying to get the image into focus--i. Time cannot be given in lab to perform PreLab activities. Record p, q, and hi for four different relative positions of the object, lens and image screen. This is lab report for Physics course. One use of refraction, the bending of light rays, is lenses. Experimentally determine the index of refraction of an acrylic trapezoid using Snell’s Law and compare (lab report) 4. It can be calculated from the lens-maker's formula for thin lenses. Explain this in your report. The glass lens which is thicker at its center than its edge is the converging lens. This is the currently selected item. Optical microscopes can be simple, consisting of a single lens, or compound, consisting of several optical components in line. " For example, if a lens makes something look 100 times as large as it really is, that lens's magnification strength is 100x. Complete Gizmo: Ray Tracing (Lens) Activity 'A' Do 1 ray diagram for a converging lens: object beyond 2f, at 2f or 1. First, when p = q, then both the object and image are 2f from the lens. EDRS PRICE MF01/PC09 Plus Postage. See Image 1 in Figure 4. Only a converging lens can be used to produce a real image; and this only occurs if the object is located at a position of more than one focal length from the lens. Geometric Optics Converging Lenses and Mirrors Physics Lab IV Objective In this set of lab exercises, the basic properties geometric optics concerning converging lenses and mirrors will be explored. Experimentally measure the image distance and con firm the thin lens equation. When parallel rays of light pass…. True An object is located infinitely far from a converging lens of a focal length 70. pdf), Text File (. A case 2 image is formed when d o < f. Figure 2 Secondary focal point of a converging lens. Golden Rule: “Do unto others as you desire them to do unto you. conservation of mass lab report due. Thin Lenses 6. 0 cm mark on the optical bench. Physics 2 Lab Report 7 (Focal Length of Lenses) - Focal This preview shows page 1 - 3 out of 3 pages. Figure (4) 2. Determine the focal length of a converging lens. 00 cm is located at the 28. 4: Ray Tracing: Nearby Object As mentioned, a diverging lens will usually form a. HYPOTHESIS: The relationship between u and v and the focal length f for a convex lens is given by. For a converging lens, if the incident rays are parallel with its principle axis, the refracted rays by the lens converges at the focal point on the same side of the lens as the refracted rays. –A diverging lens has a negative focal length. If by graphical method, you mean actually plotting a graph, then I suggest you perform an experiment of measuring various Do and Di and plotting them. The lab is pretty much the same as is described in Lab 41 except that image is formed at the focal length of a converging lens. T hurs Nov 28 - Test: Light & Optics Fri Nov 29 - Finish Lens lab BIOLOGY: Cells and Human Organ Systems Mon Dec 2 - Intro to Microscope (parts and use) - Finish Lens lab report Tues Dec 3 - Microscope Calculations -finish worksheet on microscope calculations Wed Dec 4 - 2. Light will bend toward the normal when going from a medium with low n to high n. The following sites will give you examples of the workings of both converging and diverging lenses and mirrors. 13-1 and 13-2) consists of a refracting medium. Optical microscopes can be simple, consisting of a single lens, or compound, consisting of several optical components in line. we used a converging lens and a screen with white paper in front of a window to form an image of a distant tree outside. Time cannot be given in lab to perform PreLab activities. Experiments to measure the focal length of a converging lens The position of the lens holder is adjusted until a sharp image of the object is formed on the screen alongside the object itself. Fix a thin convex lens on the lens holder and place it on the table same as that done in the case of concave mirror. Experiment 22: Thin Lenses 127 Rays of light from a nearby object will arrive at the lens at various angles. 55) One of the most common lens materials. Move the point named " Focus' " to change the focal length. The rays converge to a point, where the real image is formed, as the beam of rays parallel to the axis passes through the lens. 2(Homework + Quiz Grade) + 0. Finish Snell’s Law Lab; Thursday. 1 The Thin-Lens Equation. They can be identified by their shape. compound microscope - light. If there are defects in the manufacture of the lenses, that should be revealed by any difficulties experienced in trying to get the image into focus--i. The lens or lenses in the lower end of a microscope or other optical instrument that first receives light rays from the object being examined and forms its image. Written to provide the reader info and make me focused on your experiment. Open up the green notebook on your workbench to the workstation inventory section at the back. 0 cm from the lens. Quiz on Thursday/Friday. Lens equation. measure the distance between the object and lens, which is called "U" 2. The lens we will use in this simulation is a thin double-convex lens. Question Lab 12 Focal Length of a Converging Lens 1. Equipment: < Optical bench < Converging achromatic lenses with focal lengths of about 13 cm and 60 cm. Simple Light Refraction Experiment. Refer to Fig. Crystalline Lens: 1. Note: Your drawings are your data sheets in this lab. Purpose: In this activity you will be looking at the formulas for the location and height of an image formed by a converging lens. You use a converging lens (the objective) to form a real (first) image as you did in the "Converging Lenses" section. Conclusion: From the results of the lab we calculated the focal length of our converging lens to be 19. So the more highly curved the surface, the shorter is the focal length and visa-versa. Determine the focal length of your converging lens. is positive. Physics 2 Lab Report 7 (Focal Length of Lenses) - Focal This preview shows page 1 - 3 out of 3 pages. If you use this method, please feel the lens through a piece of cloth or lens tissue to avoid putting fingerprints on the lens. For example, choose for p any of these distances: 40, 50, 60, 100 cm etc. EXPERIMENT #1: Geometric Optics Converging Lens - Image and Object Relationships EQUIPMENT NEEDED: -Optics Bench -Light Source -75 mm Focal Length Convex Lens -Crossed Arrow Target -Component Holders (3) Viewing Screen Crossed AITO Target Figure 1: Equipment Setup Introduction Given a lens of any shape and index of refraction, you could determine the shape and location of the images it. glass), bounded by two surfaces, of which atleast one is buldged. (You should also try this with five parallel rays. Background. The beam is then refocused by Lens 3 to a focal point where the recording film is located. 2 Cell theory and organelles. M; lab reports from pea seedlings modified from. Image Formation with Converging Lenses - Java Tutorial. (This is not easy to do, you will probably only be able to make a rough estimate of where the image is) Draw a sketch in your notebook of the lens showing your view and the apparent image of a nearby object. *** More Bonus: Bring objects that might have drag D = Cv to try out. This will be the criterion used for grading your lab report, although. Record p, q, and hi for four different relative positions of the object, lens and image screen. lab questions will be out of 24 marks. Below are all the labs available on this site. Light and Reflection (1) - Free download as Powerpoint Presentation (. ) Position the light source, the convex lens, and a screen on the optics bench so that a focused image appears on the screen. compound microscope; refracting telescope : p. Field lines never intersect each other. Refraction, Critical Angle, Total Internal Reflection. over life span) 130,985. Marking Instructions. Apparatus: Metre rule with holes drilled at the 25cm, 50cm and 75cm mark, 50g masses 50mm long bolt with a diameter of approximately 5mm, retort stand, boss head and clamp, 0-10 N spring balance, electronic pan balance ,wire or string for suspending masses from the metre rule, two. Thin Lens Lab: Description and purpose: In this lab, we used convex convex lenses to project real images on a screen. lenses and mirrors. Images Formed by Convex Lens Convex lenses can form two types of images: real and virtual. NCERT Class 10 Science Lab Manual - Image Formation by a Convex Lens Practical. disc for "4" shape object and inverted image on the screen formed by a converging lens. Cimbala, Penn State University adjust the manual focus ring on the camera lens. lens so it won’t fall out. How does a lens form an image? See how light rays are refracted by a lens. A converging lens is somewhat similar to a magnifying glass. Meter scale. In a convex lens (sometimes called a positive lens), the glass (or plastic) surfaces bulge outwards in the center giving the classic lentil-like shape. Converging lenses are convex with a positive focal length and diverging lenses are concave with a negative focal length. The objective is to verify the thin-lens formula by forming the image of an object in a converging (convex) lens. The size of the aperture will affect the diffraction limit of a lens. Focal Length of a Converging Lens. Draw a long straight line down the middle of a sheet of white paper to be our optical axis. 00 cm point on an optical bench. First, when p = q, then both the object and image are 2f from the lens. This quantitative, inquiry based laboratory exercise for physics or physical science classes examines converging lenses. A virtual image is one which cannot be formed on a screen as the rays of light do not actually meet after passing through the lens. (a)what is the focal length of th lens?? is the lens converging or diverging ?. The first two. 5 to fill in the blanks Thursday, June 8 Take up Optics Practice Test Lenses and Formation of Images Summative self-assessment and reflection Homework:-Lenses booklet (converging, diverging). PREPARATION ASSIGNMENTS FOR MY LAB COURSE (PHY 161) ARE LINKED BELOW AND ARE DUE THE DAY YOU ENTER THE LABORATORY. According to the lab procedure, how are we to determine the focal length of the lens or. The same lens can be used in subsequent labs of if measurements need to be redone for this lab. Determination of Focal Length using Graphical Methods and Improvisation of an Optical Microscope Summary Determination of the focal length of a converging lens Objectives Results and Discussion (C & D) produce an image at infinity Percent difference: +75 mm- 13. A similar point the same distance in front of the lens is called the lens' secondary focus, F'. Converging (positive) lens. Open up the green notebook on your workbench to the workstation inventory section at the back. Then move the screen closer and try again. Practice: Using scallops to correct vision. Explain how an image is formed by a converging lens using ray diagrams. This happens to converging lens. Experiment 3a: Optical Bench with a Converging Lens. 469 #1-10 Lesson #37, Monday April 4th: 11. A typical lab report without any pre or post. Remember the focal length is determined by the curvature of the lens and the index of refraction of the material used in making the lens. 1 Purpose In this experiment, the formation of images by concave and convex lenses will be explored. The distance from the image to the lens is the same as the focal length, f. Report these and other data in a nicely crafted Table. You can also illustrate the magnification of a lens and the difference between real and virtual images. The goal of the experiment is to be able to analyze ray diagrams so as to determine fundamental properties of image formation. Lenses are basically of two types. 5x, brown means 2x or 2. 1 Purpose In this experiment, the formation of images by concave and convex lenses will be explored. I know that constant acceleration on an acceleration vs time graph is a straight line so why isn't my graph a straight line?. Typically, the surfaces of the lens are concave or convex, and are characterised by radii of curvature R i. Focal distance, lensmaker's equation. Parallel rays incident upon the lens will converge at the image focal point. Ray diagrams are constructed by taking the path of two distinct rays from a single point on the object. Labs Available on the Physics Aviary. Converging Lenses advertisement Converging Lenses Isaac Ilivicky and Noam Kantor Purpose • • • The purpose of this lab was to investigate the relationship between the object distance and the image distance for real images produced by a converging thin lens. edu EXPLANATION Instructor will gather all students away from the lab in order to start discussion. ) Figure 3. Second Pre-lab: Derive your methods for measuring the air drag of coffee filters. The same lens can be used in subsequent labs of if measurements need to be redone for this lab. This image is the virtual object for the diverging lens, OD. The eye has no problem focusing such rays on the retina. Practice: Converging and diverging lenses in a lab. Friday: Due: Problems, Study for Test; In Class: Review Lab Questions, Lab - Curved Mirrors; HW: Read and take notes on pg. time graph is not constant when it should be? I am doing a constant acceleration lab with a car racing down a ramp. Real and Virtual Images: Lenses produce images by refraction that are said to be either real or virtual. Objective: To give the student an introduction to the properties of simple lenses and lens systems. extension- calculating the magnification of an image produced by a converging lens. The u versus v graph is a hyperbola as shown in figure. The simple microscope enables us to view very small. Mirrors Test; Thursday. Time cannot be given in lab to perform PreLab activities. abstract the goal of this lab was to determine how converging and diverging lenses create images on screen. Use Pfund’s method to determine the index of refraction for ‘soda-lime’ glass slab. Lens equation. 1 2 1 1 1 f f f. Hence convex lenses are called converging lenses. It is thinner at its center than its edges and always produces a virtual image. Let y = 1 / u, and x = 1 / v. Place a converging lens on the optical bench between the illuminated object and the screen. converging lens between the object and the eye, the rays entering the eye become less divergent. A lab report generally follows the scientific method, that is, (1) research, (2) make a hypothesis, (3) design an experiment, (4) perform the experiment, (5) analyze the experiment to determine if it confirms or contradicts the original hypothesis, and (6) report your findings. Points will be taken off if your work is not. A common Gaussian form of the lens equation is shown below. first, we did this using converging lens to find. Wikipedia - Lenses (includes basic diagrams and c Lenses and stuff you should know about them. Your grade for Exp. Imaging with converging/diverging mirrors. EQUIPMENT NEEDED: Optics Bench, Light Source, Ray Table Base, Component Holder, Diffraction Scale, Diffraction Plate, Diffraction Grating, Slit Mask. Move the lens around to see the locations at which an image forms on the screen. Interference. Converging Lens. Strength of the magnetic field can be increased by: increasing the current in the coil. Supplementary Questions. Ray diagrams for single converging and diverging lenses are shown in your textbook. Note the results (p and q) in a table including a description of the image in each case. (5 points) 2. The range of possible focal lengths is very large, from a few milli- metres for the objective lens of a microscope to 20 m in a large telescope. Lab 1 Resonance Resonance Lab 2 Electric Fields Electric Fields Lab 3 Ohms Law Ohms Law Labs 4,5, 6 Pasco AC/DC Labs Pasco AC/DC Labs Labs 7 and 8 Refraction and Total Internal Reflection Labs Refraction and Total Internal Reflection Labs Labs 9 and 10 Converging Lenses and Spherical Mirrors Converging Lenses and Spherical Mirrors 1402 Formulas 1402 Formulas LAB REPORT Grade criterion LAB. Note: There is a minor typo in the lab manual. Lab 9 Geometrical Optics L9-1 Name Date Partners Lab 9 - Geometrical Optics Optics, developed in us through study, teaches us to OBJECTIVES • To examine Snell’s Law • To observe total internal reflection. Converging Lens. first, we did this using converging lens to find. Lab 2 - Lab Lab 3 Resistivity - lab report Lab 8 Magnetic Field of a Slinky Solenoid Lab 2 Ohm's Law. A converging lens is thicker at the center than the periphery, and the incident parallel rays converge to form a real image on the opposite side of the lens from the object, Figure 1. 5 In today's lab First we'll become accustomed to forming images using a converging lens and use object and image distances to determine its focal length. Convex Lens Practical Class 10 Introduction. A lens is a piece of transparent material bound by two surfaces of which at least one is curved. Locate a distant tree/building from the open glass window (if an open window is not available then obtain the image of the window itself on the screen. Applicable to Physical Science, Physics, Honors Physics, and AP Physics classes. A positive number indicates a convex/converging lens while a negative number indicates a concave/diverging lens. Lab 1 Resonance Resonance Lab 2 Electric Fields Electric Fields Lab 3 Ohms Law Ohms Law Labs 4,5, 6 Pasco AC/DC Labs Pasco AC/DC Labs Labs 7 and 8 Refraction and Total Internal Reflection Labs Refraction and Total Internal Reflection Labs Labs 9 and 10 Converging Lenses and Spherical Mirrors Converging Lenses and Spherical Mirrors 1402 Formulas 1402 Formulas LAB REPORT Grade criterion LAB. The image is 12 cm from the lens on the same side as the object. Tomorrow: Test Chapter 6 SNC2D Lesson: Converging and diverging lenses. EDRS PRICE MF01/PC09 Plus Postage. The pre-lab worksheet for this lab is a review of strength of materials. Procedure 1. Have the students view themselves in the concave (inward) part and observe themselves. Place the lens between them and adjust the position of the lens to obtain a focused image of the filament on the screen. Tips for setup: For best results, make sure the two beams are almost exactly on top of each other before placing lens in front of laser! Same tips as in FP apply to Michelson. EQUIPMENT NEEDED: Optics Bench, Light Source, Ray Table Base, Component Holder, Diffraction Scale, Diffraction Plate, Diffraction Grating, Slit Mask. It is a convex lens having a short focal length. Perform in a well lighted room. The focal length of a converging lens is then defined as the distance between the centre of the lens and the focal point. Dec 12th Lab: Lenses. Trace the rays for the lens closest to the light Straighten up your lab station. The ensuing struggle could result in a chipped or dropped lens. Lab 1 - Lenses and Simple Lens Systems I. ) Such a lens is called a converging (or convex) lens for the converging effect it has on light rays. The exercise measures the focal length of a converging lens by using a simple optics bench. Place a converging lens on the optical bench between the illuminated object and the screen. Lenses - Finding the Focal Length of a Convex Lens Apparatus convex lens, piece of paper, window or light source at opposite end of room or corridor Action A student holds the lens up towards the window, and holds a piece of paper on the other side of the lens. One or both surface usually has a spherical curve. Report these and other data in a nicely crafted Table. * Calculate the magnification of an image formed by a converging lens. It must be turned in at the start of the lab period. Thin Lens Equation Lab (#2) In part one of the thin lens equation lab, the goal was to observe. Auxiliary Materials: None Scoring Rubric: RL10. Notes on Uncertainty. A lens is an object made of a material that refracts light rays; that material is characterised by an index of refraction n. Since the lens was previously one focal length away from the original source, x + f is now the object distance. Begin Mirror Review Sheets; Tuesday. is positive. 2 Images Formed by Lenses 10. This yields the correct formula, 1/do + 1/di = 1/f for thin lenses. • Repeat for angles of incidence 20 °, 30, and 40. Put the screen holder rod into a carraige and place it on the optical bench. Apparatus: An optical bench, 2 convex lenses, a concave lens, a plane mirror, object and image pins, light source and ground glass screen. A virtual image is one which cannot be formed on a screen as the rays of light do not actually meet after passing through the lens. The Lens Equation Lab Included, labeled and organized all parts of the lab report. Parallel rays incident upon the lens will converge at the image focal point. 1 Refraction in Lenses 10. Feb 6th Complete Microscope Handouts. Compressible Flow in a Converging-Diverging Nozzle Prepared by Professor J. A common Gaussian form of the lens equation is shown below. A diverging lens is any lens thicker at the edges than in the center (concave surfaces). (Use the back of this page to trace the rays and make measurements. Place the screen at the very end of the optical bench at the 0. Introduction. Light and Distance Lab (#1) Thin Lens Equation Lab (#2) Build A Telescope (#3) Aperture and Depth of Field (#4) Light Intensity and Polarization Lab (#5) Conclusion. A Fresnel Biprism is a variation on the Young's Slits experiment. Then I would go into the hospital information system to review somebody's chart, and see a progress note from Tyler that said the patient's lab report was. Figure (4) 2. Description Simulation of image formation in concave and convex mirrors. Convex Lens: 3. Lab Report Outline and Assignment Marking Scheme Tues. This lab is designed to reinforce the concepts of images formed by converging lenses. ** Bonus: Bring cupcake papers that can stack up for the class to use in the lab for D=Cv^2. • Draw a schematic of your telescope setup. Images with “Thin” Lenses Updated 2/2017 jmh, rc Materials 1 each PASCO Basic Optics Light Source 2 each lenses: one with a negative focal length, the other with a positive 200 mm focal length 1 each empty lens holder 1 each optical track (optical bench) 1 each optical target screen 1 each metric ruler Goals … Continue reading "Lab Report". Biology In Elementary Schools is a Saint Michael's College student project from a course that ran between 2007 and 2010 and fully described in this book chapter. The beam is then refocused by Lens 3 to a focal point where the recording film is located. theoretical value = 299,800 km/s 2. Concave lens (diverging lens) Thinner at the centre than at the edges. 0 cm mark on the optical bench. Lab report. One or both surface usually has a spherical curve. 231792344 λ 2 λ 2 − 0. Two experimental variants for the determination of the focal length of a convex lens are suggested, so that at least once the students can discuss the advantages and disadvantages of each. LENS Apparatus Converging lens, screen, lamp-box with crosswire, metre stick, retort stand. 3) Lab: Experimental design lab on mirrors & lenses Note: Solve all problems using both a ray diagram and the mirror/lens equations. Convex or converging lenses have positive (+) focal lengths while concave or diverging lenses have negative (-) focal lengths. Honors Physics 2013 Optics Unit Lab Report. not where you see colors on the edges of the image which are caused by "dispersion"). double convex lens A double convex lens, or converging lens, focuses the diverging, or blurred, light rays from a distant object by refracting (bending) the rays twice. In this lab, you will perform experiments to verify the lens equations and determine the focal length of a converging in Part I. Converging Lens Goal: To measure the focal length of a converging lens using various methods and to study how a converging lens forms a real image. Only a converging lens will do that — a lens that converges parallel rays of light down to a point. pptx), PDF File (. We attempted to track the distances between the lens and the light source (the object distance) and the lens and the screen (the image distance), which would produce the real images. As the intensity of light falling on a beaker increases, the resistance of the LDR decreases. Instructors can send requests for in-lecture demonstrations to [email protected] However, in these lenses, the image is viewed as long as the object is outside of the focal point the image is real and inverted. from the lab manual uploaded , you will see "the focal length of lenses" lab , that you need to write me a new lab report and do the questions. To Measure the Focal Length of a Convex Lens Diagram Apparatus • Ray box + cross-threads • Convex lens • Screen • Metre stick Procedure 1. Teacher will initiate discussion to allow students to share their findings and observations. A lens is a piece of transparent material bound by two surfaces of which at least one is curved. If you're behind a web filter, please make sure that the domains *. The distance from the center of the lens to the principal focus is called the focal length of. [1] Figure 1. disc for “4” shape object and inverted image on the screen formed by a converging lens. In each case, position your eyepiece lens where you see the sharpest image in black and white (i. You will verify the predictions of the lens equation (for a thin lens) and understand the transverse magniflcation of a convex lens. The distance from the image to the lens is the same as the focal length, f. The Organic Chemistry Tutor 46,277 views. Because of its ability to focus light a converging lens can produce an image of an object, as represented in Fig. should be clearly organized and include: Purpose. Thin Lenses. A place to find notes, problems, worksheets, links, and other information about class. Diffraction will limit the performance of an ideal lens. The distance from the lens to the foci F and F' are equal. Note that this is a PreLab. Adjust the height of the object, lens(es), and screen so that the optical axis passes through the center of each element. Since the lens was previously one focal length away from the original source, x + f is now the object distance. 012-02744K Introductory Optics System iii The PASCO scientific Introductory Optics System is designed to provide a comprehensive introduction to laboratory optics. 1 2 1 1 1 f f f. Rays of light that pass through it converge at a focus point Distance between the focus point and centre of lens = focal length. The easiest and fastest way to roughly evaluate a lens focal length is to hold it under a ceiling light. This is called total internal reflection. The angle at which the light enters the lens depends on the distance of. The following lab was created by Nick Donovan. Direct the parallel light rays through the convex lens. Since the lens was previously one focal length away from the original source, x + f is now the object distance. 32: 124,000. The image formed by a plane mirror is at the same distance behind the mirror as the object is in front of it. This fact can be used to measure the focal length of a converging lens quickly, easily and with reasonable accuracy. 3-1 and 3–3. I've done everything as stated in the procedure. I then placed an object at different. Converging lens of unknown focal length1 1Instructors: see note on page 63. In this experiment you will use a diffraction grating to determine the range of wavelengths for each of the colors in the visible spectrum. Differences and ray diagrams. Were it not for the development of eyes, there wouldn't be a lot to say about the interaction of light with reflective and refractive media except that it sometimes. *** More Bonus: Bring objects that might have drag D = Cv to try out. A similar point the same distance in front of the lens is called the lens' secondary focus, F'. Focal length is defined as the distance at which a lens (or mirror) will focus to a point light from a source very far away. Focal point is the point to which parallel rays are converged by a converging lens or from which the parallel beams appear to diverge from a diverging lens, Focal length is the distance between the focal point and the center of the lens (see Fig. Finding images with ray tracing. In particular we will find the focal length of a lens (converging) using the lens equation. LED light source with condenser lens and slit The facility used in this lab experiment is a small wind tunnel, driven by a large compressor located in the basement. the mirror or lens. There are two main types of lenses, known as convex (or converging) and concave (or diverging). Focal length is defined as the distance at which a lens (or mirror) will focus to a point light from a source very far away. Wikipedia - Lenses (includes basic diagrams and c Lenses and stuff you should know about them. 1, the combination of Lens l, Lens 2 and the spatial filter is used to expand and collimate the laser beam. The most common types of converging lenses are the Plano-convex and biconvex lenses. Thin Lens Equation Lab (#2) In part one of the thin lens equation lab, the goal was to observe. To ensure that all essential concepts are covered, the experiments in this guide. Move the point named " Focus' " to the right side of the lens to change to a concave lens. The eyepiece may be either a converging lens (making a Keplerian or astronomical telescope) or a. Join 15 million students on StudyBlue to study better, together. Use the +100 mm lens as the eyepiece for your astronomical telescope. Experimentally determine the focal length and magnification of a convex (converging) lens (lab report) 4. Definition A lens placed in the path of a beam of parallel rays can be called a diverging lens when it causes the rays to diverge after refraction. A place to find notes, problems, worksheets, links, and other information about class. e the image will be real but not visible. A Study of Thin Lenses Abstract and Discussion. know ahead of time that you will miss a lab. Record the angle of refraction as the beam emerges. Two experimental variants for the determination of the focal length of a convex lens are suggested, so that at least once the students can discuss the advantages and disadvantages of each. The object distance \(o\) is always positive. A converging lens causes parallel rays to converge, and a diverging lens causes parallel rays to diverge. Meter scale. Lenses - Finding the Focal Length of a Convex Lens Apparatus convex lens, piece of paper, window or light source at opposite end of room or corridor Action A student holds the lens up towards the window, and holds a piece of paper on the other side of the lens. A convex lens with a focal length of 0. The smallest achievable spot of a lens = 2. It creates an image at a distance of x’ + f from the second principle point in image space. Remember, the real focal point of a lens is behind the lens. A lens with one of its sides converging and the other diverging is known as a meniscus lens. ) Determine the radioactive half-life from the following set of radioactive decay data taken at 30-second. Also, the magnification is defined as: Ok. The objective lens must be a converging lens of relatively long focal length. The size of the aperture will affect the diffraction limit of a lens. cylindrical lens on the ray table. We will be using the optical bench with the light source and the viewing screen to determine the focal lengths of the two lenses. 1 Simple Measurement of Eyepieces Lens’s Focal Length. Please sign in or register to post comments. Hence convex lenses are called converging lenses. A diverging lens is any lens thicker at the edges than in the center (concave surfaces). Experiment 3-magnification and the converging lens. The focal point (or principal focus) for a converging lens is defined to be the point at which the rays of an incoming parallel beam of light would be made to cross by the lens, i. Exploration of Optics: Converging and Diverging Lenses 3 2275 Speedway, Mail Code C9000 Austin, TX 78712 (512) 471-5847 www. MIRRORS AND LENSES §38-2 (b) Thedistances is positivewhentheobjectis totheleftofthemirror. The purpose of this experiment is to understand how images are formed differently in a plane, a concave, and a convex mirror. Use the formula below to calculate the focal length f. A plano-convex lens converging parallel rays A biconvex lens converging parallel rays Light rays refract at the interface between glass and air according to Snell's law. Draw a line perpendicular to the optical axis in the middle of the page to be our lens plane. Then we will form an image with a two lens system, using a converging and diverging lens, to determine the focal length of a diverging lens. Convex surfaces bends or converges and concentrates light or sounds towards a common point. The Ray Box will. 1 Simple Measurement of Eyepieces Lens’s Focal Length. Repeat the same steps with diverging lens. By measuring the coordinates of point C whose coordinates are (2f, 2f) we can calculate the focal length of the lens. Any lens that is "thicker in the center" than on the edges is generally described as a convex lens and will function as a converging lens when it is operating in air. For example, choose for p any of these distances: 40, 50, 60, 100 cm etc. Place the diverging lens between the converging lens and O D. When we used an optics bench and a candle to figure out the focus, it was 16. LAB - Friction lab #2 File Geogebra Inclined Plane Forces URL Set initial conditions (angle, mu, initial velocity) and try to predict acceleration, and displacement at a certain time. Hand in Introduction and Procedure. Department of Electrical Engineering, Lahore University of Management Sciences, 54792,. This fact can be used to measure the focal length of a converging lens quickly, easily and with reasonable accuracy. Real images can directly project on a screen. Use the formula below to calculate the focal length f. For a diverging lens, if the incident rays are parallel with its. Complete all the identification fields below or 10% of the lab value will be deduced from your final mark for this lab. Purpose: In this activity you will be looking at the formulas for the location and height of an image formed by a converging lens. Feb 6th Complete Microscope Handouts. Grading is on a 20-point scale. The mean of these measurements is taken to be the focal length of your lens. Method (c): “Lenses-mirror method” is suggested to measure the focal length of a spherical concave lens. I know that constant acceleration on an acceleration vs time graph is a straight line so why isn't my graph a straight line?. Objective To measure the focal length of convex (positive or convergent) lenses and concave (negative or divergent) lenses. Essay Physic Lab Report Parallel Force. CONVERGING LENS | Optics - Flash animation for optics learning - Interactive Physics Simulations | Interactive Physics Animations | Interactive flash animation to learn how to get an clear image of an object on a screen. First, when p = q, then both the object and image are 2f from the lens. The most familiar type of microscope is the optical, or light, microscope, in which glass lenses are used to form the image. Background. Physics 20 Concave Mirrors Lab Part 1: Finding the Focal Length of the Mirror (f measured) Place your mirror, in its holder, on a convenient point of one metre stick (such as the 10 cm mark). The application of the thin lens equation and the magnification equations to single and compound lens systems will be investigated. A converging lens similarly corrects farsightedness (picture (d)) 1. Take the thinner converging lens out from the box and place it on a white sheet of paper as shown below. Lab Report to hand in: 1. Leigh’s answer is quite satisfactory. Place the screen behind the convex lens. Lenses are categorized into two groups where a single lens has one piece of material and a compound lens has many simple lenses, which have a common axis. "-Calvin (Bill Watterson)“A perfect day is when the sun is shining, the breeze is blowing, the birds are singing, and the lawnmower is broken. An object is 6. 1 Conceptual Questions 1) State how to draw the three rays for finding the image position due to a thin. Reset the screen to the 70cm mark. ) Clip your converging lens (approximate focal length f of +50 cm) to a lens holder, and mount at it one end of the optical bench. Equipment needed. The light must shine from a dense to a less dense medium. (e) A lens which diverges a bundle of parallel rays is called a diverging lens, or a negative lens (its focal length is taken as negative. Record this value in your notebook as the focal length of the lens. (You should also try this with five parallel rays. Then measure the focal length of your glasses as in Additional Credit Part 1, or measure the focal length of one of the unknown lenses supplied in the lab. Subscribe to view the full document. Lenses - Finding the Focal Length of a Convex Lens Apparatus convex lens, piece of paper, window or light source at opposite end of room or corridor Action A student holds the lens up towards the window, and holds a piece of paper on the other side of the lens. Using the converging lens: 1. The two faces of a double concave lens can be thought of as originally being part of a sphere. 0200179144 + 1. Objective: To measure the focal length of a converging lens. lab questions will be out of 24 marks. Real and Virtual Images: Lenses produce images by refraction that are said to be either real or virtual. from the lens to the focal point (An informative and illuminating discussion of lenses can be found in the Wikipedia [1]. Identify the means by which you can use a converging lens to form a virtual image. There is no answer sheet today, instead each group will turn in a short report. The non-fluorescent portions of the specimen merely reflect the blue light. This image is the virtual object for the diverging lens, OD. Parallel rays incident upon the lens will converge at the image focal point. When parallel rays of light pass…. The lenses used in the lab only have one curved side, so orient the lens such that the flat side is closer to the light box. (10 pts) Purpose. Imaging with converging lens. Equipment:. Converging lenses are convex with a positive focal length and diverging lenses are concave with a negative focal length. This will be the criterion used for grading your lab report, although. Lab Report/PHYS 224 Thin Lens and Image Formation Name_ _____ Lab section_____ __ Objective In this lab, you will measure the focal length of thin lens, use thin lens to form image and study the thin-lens equation, and observe the chromatic aberration of thin lens. Parallel rays incident upon the lens will converge at the image focal point. Telescopes and microscopes work on the same basic principle. 5 In today's lab First we'll become accustomed to forming images using a converging lens and use object and image distances to determine its focal length. After completing this lab, you will be able to explain how lenses work, explain the difference between convex and concave lenses, draw ray diagrams to analyze the image produced by a lens, and. So Rømer was quite a bit off by our standards today, but considering he came up with this estimate at a time when a majority of respected astronomers, like Cassini, still believed that the speed of light was infinite, his conclusion was an outstanding contribution to the field of astronomy. Record this value in your notebook as the focal length of the lens. If the source is more than two focal lengths away from the lens,. Convex lenses are a series of prisms that get stronger as the outsides of the lens are reached and in this manner, light is refracted to converge on a point called the focus beyond the lens. For a diverging lens, the parallel rays entering from one side appear, to the eye,. 4 The Human Eye and Vision 10. Converging lens lab Thread starter jnimagine; Start date Nov 11, 2006; Nov 11, 2006 #1 jnimagine. A lab project along with a report that counts as 20% of your IB exam scores (written exam counts for the other 80%) Group 4 Project—10 hours for SL and HL Students are separated into groups and must conduct an experiment and write a report. Draw you diagrams and record your observations on p. The distance from the lens to the foci F and F' are equal. The eyepiece may be either a converging lens (making a Keplerian or astronomical telescope) or a. A camera will always contain at least one converging lens, in order to project a clear, defined image. It requires the use of a meter stick, a candle, a lens, and appropriate mounting hardware. Watched NASA clip on electromagnetic radiation c. Tomorrow: Test Chapter 6 SNC2D Lesson: Converging and diverging lenses. Your grade for Exp. Pre-Lab: Thin Lenses Name: ===== Choose the best answer. They can be identified by their shape. The measurement of the focal length of a lens Knowledge of the focal length of a lens is vital in the construction of all optical instruments, from spectacles to large astronomical telescopes. Converging Lens This is only a guide for you to follow as you carry out the lab. Equipment: < Optical bench < Converging achromatic lenses with focal lengths of about 13 cm and 60 cm. There are 3 parts to this experiment. Record the position. In this trivia questions quiz, you will get to learn some more about the different lenses and mirrors and how they differ from each other. Light passes through the first lens and through the diverging lens, which flips the inverted image. Physics 2 Lab Report 7 (Focal Length of Lenses) - Focal This preview shows page 1 - 3 out of 3 pages. A similar point the same distance in front of the lens is called the lens' secondary focus, F'. The point where all rays which enter the lens parallel to its axis are brought to a focus is called the principal focus. Telescope using the two converging lenses from part 1 of this lab. If the lens is biconvex or plano-convex, a collimated beam of light passing through the lens converges to a spot (a focus) behind the lens. Subscribe to view the full document. 3 - 7 June "Deep summer is when laziness finds respectability. Screen Other Equipment Metric ruler Optics Caliper (optional, for measuring image sizes), PASCO part OS-8468?, EEE? &3 EEEEE? &-b n EEEE &3 #f! Basic Optics System Experiment 12: Focal Length and Magnification of a Thin Lens 34. Typically, the surfaces of the lens are concave or convex, and are characterised by radii of curvature R i. Focal point is the point to which parallel rays are converged by a converging lens or from which the parallel beams appear to diverge from a diverging lens, Focal length is the distance between the focal point and the center of the lens (see Fig. You do not have to write an abstract and introduction for this lab report. For in-lab reports, hand in your report to your demonstrator at the end of the sessions or you will receive a zero for this lab. Lab Report Rubric - NOTE: this is an abbreviated report. Place the light source, a converging lens, and the screen in holders along the optical bench. A concave lens bulges inward and is thinner in the middle and thicker at the edges. Use Pfund's method to determine the index. Theory A lens is a transparent object with two refracting surfaces whose central axes coincide. 1 u + 1 v = 1 f, where f is some constant property of the lens. Lenses are categorized into two groups where a single lens has one piece of material and a compound lens has many simple lenses, which have a common axis. Lab report. In this experiment, a concave, a convex, and a plane mirror are used, and the changes in image at different object distances are observed. Geometric Optics Converging Lenses and Mirrors Physics Lab IV Objective In this set of lab exercises, the basic properties geometric optics concerning converging lenses and mirrors will be explored. Depending on the focal length of the lenses, a second student may be needed to hold the second lens. Converging lens is a type of lens that converge the beams of light from a source. You will then flnd the focal. 2 Introduction 10. Draw a long straight line down the middle of a sheet of white paper to be our optical axis. 2) A convex lens is known as a diverging lens and a concave lens is known as a converging lens. To develop an understanding of how light is refracted, to apply the concept of refraction to the study of how thin lenses form images, to learn to draw ray diagrams to assist in the predicting the locations of images formed by spherical thin lenses, and to determine the focal length of a converging lens using three different methods. The object (developed negative film from step 1) is put in the converging beam between Lens 3 and the recording film, and the. How does a confocal microscope work? We put all these ingredients together: A laser is used to provide the excitation light (in order to get very high intensities). Converging lenses concentrate parallel rays of light and diverging lenses cause parallel rays of light to spread out. Handout pages 9 + Dec 14 Page 122. Meter scale. Set up the apparatus as shown in figure 2. Chapter 10 Thin Lenses Name: Lab Partner: Section: 10. True An object is located infinitely far from a converging lens of a focal length 70. EQUIPMENT NEEDED: Optics Bench, Light Source, Ray Table Base, Component Holder, Diffraction Scale, Diffraction Plate, Diffraction Grating, Slit Mask. Cimbala, Penn State University two 70-mm diameter 500-mm focal length lenses b. This is a four-part form. 55) One of the most common lens materials. Then I would go into the hospital information system to review somebody's chart, and see a progress note from Tyler that said the patient's lab report was. The rays converge to a point, where the real image is formed, as the beam of rays parallel to the axis passes through the lens. Place on object pin at a distance from the lens equal to 2 F. Converging lenses Mirror Lamp Optical track Ruler ; Open a Microsoft Word document to keep a log of your procedures, results and discussions. Return to the lab room. For example, choose for p any of these distances: 40, 50, 60, 100 cm etc. This microscope is at a small distance from the object for the magnification and hence this forms a virtual image. A Fresnel Biprism is a variation on the Young's Slits experiment. Converging Lens. Apparatus: Metre rule with holes drilled at the 25cm, 50cm and 75cm mark, 50g masses 50mm long bolt with a diameter of approximately 5mm, retort stand, boss head and clamp, 0-10 N spring balance, electronic pan balance ,wire or string for suspending masses from the metre rule, two. 42, the refractive index of diamond. Setup: Procedure: Determine the focal length of the lens using a very distant object. The power of a telescope or a microscope is usually given by its. Lab 1 Resonance Resonance Lab 2 Electric Fields Electric Fields Lab 3 Ohms Law Ohms Law Labs 4,5, 6 Pasco AC/DC Labs Pasco AC/DC Labs Labs 7 and 8 Refraction and Total Internal Reflection Labs Refraction and Total Internal Reflection Labs Labs 9 and 10 Converging Lenses and Spherical Mirrors Converging Lenses and Spherical Mirrors 1402 Formulas 1402 Formulas LAB REPORT Grade criterion LAB. Failure to follow the format guidelines given will result in the following penalties: Misnamed file (like “lab report. Lab 3: Lenses 1 Introduction Refer to Appendix D for photos of the appara-tus In this lab, you will investigate difierent methods of flnding the focal length of a convex lens. # 2-6 will be based 10 % on the pre-lab assignment, 30% on the lab work and 60 % on the lab report. This is lab report for Physics course. In order to do calculations for multiple lens systems you have to. Focal point is the point to which parallel rays are converged by a converging lens or from which the parallel beams appear to diverge from a diverging lens, Focal length is the distance between the focal point and the center of the lens (see Fig. The following sites will give you examples of the workings of both converging and diverging lenses and mirrors. Report these and other data in a nicely crafted Table. 9 seconds (good) but the new one was 1. Peckham physics 1140 lab report on calorimetry might be introduced to be Go Here a lab adopted from your lab info. Focal length is defined as the distance at which a lens (or mirror) will focus to a point light from a source very far away. Experimentally determine the focal length and magnification of a convex (converging) lens (lab report) 4. Lab VII: Converging Lens. This is a classroom lab for grades 6-12 designed to allow students to compare the action of a pinhole camera and a lens camera. Auxiliary Materials: None Scoring Rubric: RL10. Note that this is a PreLab. This fact can be used to measure the focal length of a converging lens quickly, easily and with reasonable accuracy. The top slider enables you to vary between 1. Record the angle of refraction as the beam emerges. It does not include an answer guide. Exploration of Optics: Converging and Diverging Lenses 3 2275 Speedway, Mail Code C9000 Austin, TX 78712 (512) 471-5847 www. It is thicker at the centre than at the edges. The image is then virtual, magnified, and right-side up. You use a converging lens (the objective) to form a real (first) image as you did in the "Converging Lenses" section. Were it not for the development of eyes, there wouldn't be a lot to say about the interaction of light with reflective and refractive media except that it sometimes. When the object is beyond one focal length, a converging lens produces a real, inverted image. The first two. If by graphical method, you mean actually plotting a graph, then I suggest you perform an experiment of measuring various Do and Di and plotting them. After completing this lab, you will be able to explain how lenses work, explain the difference between convex and concave lenses, draw ray diagrams to analyze the image produced by a lens, and. the collimating lens (A collimating lens is a converging lens that focuses a diverging light beam into a parallel beam). Double-slit interference. As discussed in the ’Optics of Thin Lenses’ lab, the focal length is the distance from the lens in which parallel light rays are bent and focused to a point (the focal point ) after passing through the lens. I've done everything as stated in the procedure. It causes these rays to converge. BRIGHAM YOUNG UNIVERSITY Search BYU : Contact | Help. Thin Lens Lab: Description and purpose: In this lab, we used convex convex lenses to project real images on a screen. a ray diagram or the thin-lens equations, which are the same as the. Look through this section to find the beam expander. Auxiliary Materials: None Scoring Rubric: RL10. Determine the focal length of a diverging lens using the Lensmaker's equation. A telescope focuses the rays and allows the observer to see the image of the slit. Finding the focal length of a converging lens • Choose a place to put the converging lens. The multimeter should be set to measure resistance. The pinhole is conjugate to the focal point of the lens, thus it is a confocal pinhole. o Convex lenses are converging systems and can produce real, inverted images or virtual, upright images. Header 26 • Descriptive title • Name, Date, and class information • Name of your lab station partners 2. *** See lab manual for variable definitions. Meter scale. o Lab 8 handout O4 Multiple Element Optical Systems O4. 01046945 λ 2 λ 2 − 103. The lab report should be printed. Introduction (15 points): The introduction should include a general overview of the ex-. Practice: Eye disease and contact lenses. Images with "Thin" Lenses Updated 2/2017 jmh, rc Materials 1 each PASCO Basic Optics Light Source 2 each lenses: one with a negative focal length, the other with a positive 200 mm focal length 1 each empty lens holder 1 each optical track (optical bench) 1 each optical target screen 1 each metric ruler Goals … Continue reading "Lab Report". quality lab report. Adjust the positions of the lens and screen until a clear image is formed on the screen. This is a classroom lab for grades 6-12 designed to allow students to compare the action of a pinhole camera and a lens camera. Address the points highlighted in blue. The first two. Draw a line perpendicular to the optical axis in the middle of the page to be our lens plane. The power of a telescope or a microscope is usually given by its. Cimbala, Penn State University Latest revision: 13 January 2012 Name 1: _____ Name 2: _____. 2(Homework + Quiz Grade) + 0. If by graphical methods you mean RAY DIAGRAMS, then Mr. Prelab: Thin Lenses Instructions: Prepare for this lab activity by answering the questions below. A lens is an object made of a material that refracts light rays; that material is characterised by an index of refraction n. PROCEDURE (1): Measurement of Focal Length of a Converging Lens 1. Engage your students during remote learning with video read-alouds. On your desk is a double concave lens. The lab report must include the following: 1. Light diverging from the primary focal point and approaching a converging lens will exit the lens with the rays parallel.
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