When using lenses, never touch the lens itself, hold it by the sides only. Linear polarization a5 sheet polarizer educational physics polarized filter optical. Theory lenses are frequently found in both nature and technology, wherever it is useful to form an image. Lab report about lenses example topics and well written. These produce an upright image and are used in spyglasses. View lab report physics 2 lab report 7 focal length of lenses from physics 2 at howard university. The lab report may be submitted on a separate piece of paper or as a page in your notebook. Compare the actual image distance and size to your prediction. In this lab, we began by fitting our track with a light source, 10 cm convex lens and screen. Also available on your iphone through the ibooks app. Xenvo pro lens kit for iphone, samsung, pixel, macro and wide angle lens with led light and travel case. Review variables the focal length of the lens is determined by the curve of the lens and the material of the lens.
A converging lens can produce a real image where the light focuses to an image. Your report should include your observations and appropriate sketches of images, estimates of distances to images, and answers to the questions asked in this experiment. The state of illinois has declared a mandatory shutdown which is currently in place. Finally, you will apply your understanding of lenses to design a small telescope. Labreport5lenses phy 2l general physics laboratory. Lenses 1 introduction refer to appendix d for photos of the apparatus in this lab, you will investigate di. Compound microscopes and telescopes use both convex and concave lenses. Lab report about primula this paper is involves a lab report about primula vulgarisflower. Lensesandoptics abstract this purpose of this lab was to. It consists of three parts which can, and for practical purposes probably should, be done in any order.
Lenses in optics applications types of lenses physics. Physics 223224 experiment 26 optics of the eye 226 11. Outside, one lab partner, the object should stand in the sunshine approximately 1215 meters in front of the lens. The lines on the lenses of the eyeglasses indicate the plane of polarization through which light can pass. You will verify the predictions of the lens equation for a thin lens and understand the transverse magni.
The compound light microscope, which is going to be used in this lab activity, is an instrument with two lenses and various knobs to focus the image. Last week we wrote about digital life the rise of lifelike digital experiences. The purpose of this lab is to introduce students to some of the properties of thin lenses and mirrors. The application of the thin lens equation and the magni. Quick stream to show you the thin lens experiment in class today. The lens and screen are held in place by magnetic clamps that can be switched on and off. The light rays will then refract as they pass through the lens and, for a converging lens, form an image at a distance d i refer to fig. Please remember to write your names and attach ray tracing papers to one persons lab report for grading. As an essential business serving the needs of the education and healthcare communities, we will be continuing to process and ship orders as. The homemade projector can help visualize this concept. This purpose of this lab was to investigate optical properties. Physics final lab optics free download as word doc. Physics lens physics education resources, simulations. Microscope lab report introduction microscope is a tool used to enlarge images of small objects that are hard to study with bare eyes.
When the crystalline lens becomes cloudy it is removed. 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. To determine the focal length of converging lens and its radius of curvature. Each student works with their own lens identified on the lens as student 1 and 2. The components of the experiment, that is, the optics device lens or mirror, object and image. Physics 4 laboratory snells law, lenses, and optical instruments prelab exercise please read the procedure section and try to understand the physics involved and how the experimental procedure works. For the rays shown in figures 12, light is assumed to be coming from the left, and going toward the right.
Focal length of convex lensb11 lab report objectives of the experiment. Using combinations of convex lenses may create blurry images. A similar point the same distance in front of the lens is called the lens secondary focus, f. Place the carriage with the small cm achromatic lens on. Create standing waves on a string and measure their properties. Physics 41 lab 5 determination of focal length of a converging lens and mirror. It provides the thin lens equation needed to solve the problem as well as. School projects of cbseicse lab experiments and science working model.
Call over a ta or instructor and explain your conclusion. To measure and compare the focal lengths of some lenses using different methods, and to determine the magnification of a simple telescope. The report entails the structure and functions of the flower. Phys104 lab labs exp optics refraction or lab report. Lenses and optical instruments lab 1 phy 114 lenses and. Thin lens equation experiment live a level physics youtube. Lab 2 lab lab 11 spherical mirrors and lenses lab 3 resistivity lab report lab 8 magnetic field of a slinky solenoid lab 2 ohms law.
Astronomical telescope number of unmagnified spaces. In todays lab you will be using all of the above information to calculate, in a variety of ways, the focal lengths for a converging lens and a diverging lens. Homemade projector experiments steve spangler science. Sign conventions for lenses when doing calculations for thin lenses you will need to follow the sign conventions listed below. Physics lenses are curved glasses or transparent materials.
My detailed lab reports from physics 2 lab with dr. Lab report lab reports must be submitted to the physics lab at the end of your lab period. The objective of this experiment is to measure the fo cal lengths of a converging lens and a diverging lens and investigate magnification. Convex converging lenses can form either real or virtual images cases 1 and 2, respectively, whereas concave diverging lenses can form only virtual images always case 3. Optics the subfield of physics focusing on the study of light is important to many areas of biology, including vision, ecology, botany, neurobiology and molecular biology. Thin lenses 127 rays of light from a nearby object will arrive at the lens at various angles. Type your discussions for each part at least one paragraph on a separate piece of paper numbering each discussion with the corresponding section number. Lenses and the human eye 1 experiment 6 lenses and the human eye introduction lenses focus or spread light. The point where all rays which enter the lens parallel to its axis are brought to a focus is called the principal focus. Experimentally determine the focal length and magnification of a convex converging lens lab report. Telescopes, microscopes, cameras, projectors, your eyes, all have one thing in common. Table 1 summarizes the three types of images formed by single thin lenses. Variables used to represent the distance of the object and distance of the image change depending on the resource. Convex lens, optical bench, light source, target image slide, lens mounts, and screen.
The primula vulgaris flower is a flower species within the family known as primulaceae. To determine the focal length of a spherical convex lens by lens formula method by lens replacement method. Once, it was to show a simple physics demonstration which i felt added some badly needed variety. A thin convex lens can be characterized by its focal length f, the object distance, d o. The light rays will then refract as they pass through the lens and, for a converging lens. Sketch your plan for measuring the focal length of a diverging lens below, and report the measured power of the glasses or of the unknown lens. Physics 23 fall 1988 lab 3 geometrical optics theory this laboratory is an exercise in geometrical optics, the reflection and refraction of light when it strikes the surface between air and glass, or air and water. This experiment uses a double convex lens a magnifying glass on your desk. You will be provided with equipment to explore the laws of refraction, how lenses work, and how to use them to make simple instruments. View lab report lensesandoptics from phy 112 at arizona state university. Download lenslab and enjoy it on your iphone, ipad, and ipod touch. You know that parallel rays entering the converging lens go through the focal point. Simply by swinging on a swing and collecting a bit of data, you can measure the length of the swing without ever pulling out a ruler.
Click this link to open the refraction simulation a phet simulation in a new window and then select intro. Additional optical systems will be added in future updates. In todays lab, we will analyze several physical configurations using both biconvex lenses and concave mirrors. In human eye this effect is corrected by small pupil size which cuts out light from the outer edges of the corneas. We placed the lens about 40 cm away, and adjusted the screen to the distance at which the edges of the 4 were sharpest. Lens lab report phys 216 physics laboratory ii studocu. Years ago, there were no replacement lenses available. View lab report lab report for mp4 from phy 152 at suny buffalo state college. Recall that the image from the first lens in a system serves as the source object for the second lens in. The lens on the box flips images right side up as they pass through it going from the upside down phone to the screen. You will then use this same technique to study the properties of lenses which make use of refraction to focus or defocus light. Light is an electromagnetic disturbance, and as such is described using maxwells equations, which. The primary goals are to understand the relationship between image distance, object distance, lens separation, and image scale. Please choose a user flair using the edit option next to your username above.
Lenses and optical instruments lab report free essays. These may differ than those introduced in earlier lessons. This app is available only on the app store for iphone and ipad. Optical bench, light box, lenses, lens holders, illu minated target object, white screen with scale, mirror. Even in cameras at times a combination of concave and convex lenses are used.
In this lab, you will use the technique of ray tracing to verify both the law of reflection and snells law. We will talk about how these things work using the following. Watch how the image changes when you adjust the focal length of the lens, move the object, move the lens. Minds on physics the app series minds on physics the app mop the app is a series of interactive questioning modules for the student that is serious about improving their conceptual understanding of physics. Physics 2 lab report 7 focal length of lenses focal. Placed the rotated the dial on the light source to the 4 aperture, and used this as our image to be reproduced on the screen. For the smartphone used in this experiment iphone 4s, f. Nearby object as mentioned, a diverging lens will usually form a. Posts should be pertinent and generate a discussion about physics. Physics 4 laboratory snells law, lenses, and optical. Phys104 lab labs exp optics lenses ol converging lens.
Thin lenses physics 227 lab so, in reexamining figure 1 and using the information in the chart above, you can tell that the magni cation of the image must be negative and less than 1. Dec 14, 2017 for more information on this product or to purchase this product, click is a link below. Lab 6 optics introduction geometric optics is one of the oldest branches of physics, dealing with the laws of reflection and refraction. The focus of convex lenses is where rays parallel to principal axis go. This position is located behind the lens and is usually labeled as f in ray diagrams. Optical aberrations of lenses spherical aberrations are due to differences in focal length for light rays at the outer edges of the lens and hight rays at the center of the lens. See lab point in certain situations, the position for the screen which shows a focused image can vary. The two lenses i used for this little experiment were the moment anamorphic lens. Similarly, concave lenses are used to correct nearsightedness. View lab report lenses and optical instruments lab 1 from phy 114 at arizona state university. Physics 126 laboratory manual experiment 3 lenses and images who shall teach thee, unless it be thine own eyes. This report presents a lab experiment that hopes to introduce and familiarise.
The human eye has a lens in it similar to the magnifying glass thats attached to your projector. The objective forms a case 1 image that is the object for the eyepiece. The lens equation lab included, labeled and organized all parts of the lab report. Thin lens equation and problem solving video khan academy. The primary goals are to understand the relationship between image. The same lens can be used in subsequent labs of if measurements need to be redone for this lab. To investigate the image formed by a certain thin convex lens and to determine its focal length.
Bc objectives to examine the nature and location of images formed by lenses. Kids learn about lenses and light in the science of physics including concave, convex, converging, diverging, focal point, meniscus, and plano lenses. Optics lab contains many of the optical systems required for gcse and a level physics, including. Aug 07, 2016 this physics video tutorial focuses on a multiple two lens system that contains a diverging lens and a converging lens. Get a focused image on the screen, and measure everything as before. The aim of r physics is to build a subreddit frequented by physicists, scientists, and those with a passion for physics. Phy 114 lenses and optical instruments lab section. Scribd is the worlds largest social reading and publishing site. You may be familiar with simple lenses and how they form images from the previous lab. Primarily, the goal of this lab is to test the thin lens law, using experimental measurements from several lenses.
Lab 10 reflection and refraction phy 156 physics ii. Illustrate the formation of images using the technique of ray tracking. In class you have studied the physics of thin lenses and spherical mirrors. Smartphone physics in the park to explore the power of your phone, heres a simple physics experiment you can do at your local park. If you are a company, school or university we also accept purchase orders. The resulting image from this twolens system can be real. In this experiment, we have chosen two methods to find out the focal length of a spherical lens.
An understanding of the lenses in experiment 7 will help you to understand more complicated structures with multiple lenses, such as telescopes and microscopes. Draw you diagrams and record your observations on p. Reflection takes place on the surface of an object, and refraction occurs when light passes through an object. The goal of the experiment is to be able to analyze ray diagrams so as to determine fundamental properties of image formation. The law of reflection was known to the ancient greeks who made measurements that supported this law. A ray is a line that has an origin, but does not have an end. The partner holding the lens and screen should stand in the shade and move the paper screen to the correct position to get as sharp as image as possible.
A concave eyepiece is used to correct this problem. Two lens system take the convex t lens off of the optical bench. The eyepiece forms a case 2 final image that is magnified. Where f is the focal length, u is the distance between the object and the lens v is the distance between the image and the lens. The relationship between u and v and the focal length f for a convex lens is given by. A converging lens always has two focal points, the primary focal point on the near side of the lens towards the oncoming light rays and a secondary focal point on the far side of the lens away from the oncoming light rays. Include a statement that the work done in this lab and submitted in this report is yours and your partners. The calculator pad home calculator pad refraction and lenses. Lecture and demo for experiment on image formation using lenses and mirrors. 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. 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. Were working with educators and institutions to improve results for students everywhere. Determination of focal length of a converging lens and mirror. Shooting photos with anamorphic lenses is a fun way to get out of a.
This part of the lab report tells us how well you understand the experiment. Use a meter stick and white screen to quickly estimate the focal length, f of the concave mirror to the nearest ten centimeters. The purpose of this lab is to investigate the properties of multiple thin lenses. In each case, position your eyepiece lens where you see the sharpest image in black and white i. Focal length of a lens the following website should be accessed before coming to class. See lab point in certain situations, the position for the screen which shows a focused image can vary slightly while still showing a sharply focused image. Ive just spent a long time mathematically proving it, but here is the short answer.
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