This law states that the index of refraction of the incident medium multiplied by the sine of the. Phy lab essay 948 words 4 pages geometrical optics. Investigates the relationship between the angle of incidence and the angle of refraction, comparing the critical to the known angle. The protractor is used for measuring of the incident and refracted angles. Snells law experiment with glass block physics forums. This experiment will require you to follow the steps below 5 times once for each piece of a4 paper.
Play with prisms of different shapes and make rainbows. In part 1 of this lab you will investigate the bending of light as it. What happens when light travels from one medium to another, like from air to water. A complete laboratory report is not required for this experiment. With three of the four variables known, substitution into snells law followed by. Light is shone through a glass block at various angles. The purpose of this laboratory activity is to develop a set of experimental procedures that answer questions regarding snells law and the index of refraction. Snells law northwestern undergraduate physics labs. Place the glass block in the middle of the a4 piece of paper so that its sides are parallel to each of the sides of the paper and draw around the block with a pencil to make its outline on the piece of paper. You will be provided with equipment to explore the laws of refraction, how lenses work, and how to use them to make simple instruments. Using snells law, determine the constant when the angle of incidence and the. See how changing from air to water to glass changes the bending angle. The law of reflection states that the angle of incident ray equals the angle of the reflected ray, or. With three of the four variables known, substitution into snell s law followed by algebraic manipulation will lead to the answer.
It includes short videos on refraction and snells law, two interactive animations, a lab activity to measure the index of refraction, and a video from the national center for information and communications technologies that illustrates the importance of snells law in fiber optics. For those interested in seeing a derivation of snells law, please reference this accompanying lesson. Lab 10 reflection and refraction phy 156 physics ii. Use the same setup as part 1, adjusting the angle of the laser pointer until you observe total internal reflection. View lab report snell s law lab report from physical s ap physics at carmel high school. 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 lab report lab 5 direct current meters. 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. Answer the following questions as preparation for the lab and include it in the appendix of your lab report. Description you will observe how white light interacts with a planar surface of transparent material. You will monitor a reflected and a transmitted ray to decide whether the law of reflection andor snells law of refraction predict your observations adequately. The answer can be described by snells law, which is the main focus of this lesson. Snells law also known as snelldescartes law and the law of refraction is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air in optics, the law is used in ray tracing to compute the angles of incidence or refraction. Snells law and the index of refraction introduction.
Relationship observed by shining light rays from six different angles through a rectangular glass block, while recording the change of angle caused by refraction, further ascertained with the use of snells law. Refraction of light lab report alevel science marked. The indices of refraction n i and n r are given and the angle of incidence can be measured. To use snell s law to determine the index of refraction n of a piece of glass and to use it to find the speed of light in that glass materials. For example, for the snells law lab, you would need to define snells law of refraction in both words and formula, as well as talk about and illustrate what refraction is as well as define and explain each of the variables used in snells law. Experiment%11% reflection,%refraction,%dispersion%% of. Lab 4 refraction, total internal reflection, polarization, and intensity oh my. Conclusion the goal of this experiment was to verify snells law and the law of from phy 114 at arizona state university. Use snells law to determine the index of refraction of the acrylic rhombus. Lab 9 reflection, refraction and total internal reflection. Snells law, in optics, a relationship between the path taken by a ray of light in crossing the boundary or surface of separation between two contacting substances and the refractive index of each.
In each of these two example problems, the angle of refraction is the variable to be determined. Since each lab group will turn in an electronic copy of the lab report, be sure to rename the lab report template file. R the law of refraction snells law relates how a ray of light will behave when passing from one media to the other. To verify snells law and measure the refractive index of. Snells law experiments optics and optical phenomena. To verify snells law and measure the refractive index of a solid diagram apparatus laser glass block protractor procedure 1. A ray is a line that has an origin but does not have an end.
Unlike reflection, refraction also depends on the media. When light passed from air into a denser medium, the. Light is an electromagnetic disturbance and, as such, is described using maxwells equations, which expresses the relationship between the electric. Reflection and refraction equipment acrylic block set, planeconcaveconvex universal mirror, cork board, cork board stand, pins, flashlight, protractor, ruler, mirror worksheet, rectangular block worksheet, equilateral prism worksheet, converging lens worksheet. The law of refraction, referred to as snells law, states the following. To determine the degree to which a light ray bends as it obliquely transitions from one medium to another, we will use our knowledge of refraction and snells law. Physclips provides multimedia education in introductory physics mechanics at different levels. Lab partners name geometrical optics introduction in geometrical optics, refraction is described by snells law.
Reflection and refraction university of calgary in alberta. You will then use this same technique to study the properties of lenses which make use of refraction to focus or defocus light. Place a glass block on a sheet of paper and draw its outline. Snells law in this experiment, you will verify snells law using a refraction cell and laser part 2.
The law of refraction is also known as snells law, named for willobrord snell, who discovered the law in 1621. The index if refraction is defined as a ratio of the average speed of light through a medium divided by the speed of light through a vacuum. A report on snells law experiment education lab report. Refraction and snells law smu department of physics. With the block removed, the student can draw in a normal line and then measure the angle of.
Full text of physics 11, snells law experiment see other formats physics experiment 6 snells law purpose. The project should include some background information on snells law, all the steps taken in the experiments, key experimental results and a conclusion about the experiment including identification of the unknown solid from the refractive index. The ratio of the speed of light in a vacuum c to the speed of light in a solid v is called the index of refraction n of the solid. To use snells law to determine the index of refraction n of a piece of glass and to use it to find the speed of light in that glass procedure. The goal of this experiment was to verify snells law and the law of reflection. Derive the equation for the separation distance between adjacent. In this lab, you will use the technique of ray tracing to verify both the law of reflection and snells law.
Homework statement b a student wants to find the refractive index of a rectangular block of glass. Aim a laser at the glass block so that it emerges on the opposite site. Snells law lab christie fosina physics regents purpose. A calibrated paper template allows the angles of incidence and refraction to be. Apart from this difference in refraction, snells laws is followed throughout. Modules may be used by teachers, while students may use the whole package for self instruction or for reference. View lab report snells law lab report from physical s ap physics at carmel high school. The law of reflection snells law states that the ratio of the sines of the angles of incidence and refraction is equivalent to the ratio of velocities in the two media, or equivalent to the opposite ratio of the indices of refraction. To use snells law to determine the index of refraction n of a piece of glass and to use it to find the speed of light in that glass materials. Scribd is the worlds largest social reading and publishing site.
Physics 4 laboratory snells law, lenses, and optical. This law was discovered in 1621 by the dutch astronomer and mathematician willebrord snell also. During the course of analyzing our data, we calculated the index of refraction for the plastic lens and thereby the speed of light in the plastic. Objectives to verify the law of reflection by measuring some incident and reflection angles off of a mirrored surface to determine the relationship between the refraction of light and snells law. The purpose of this lab is to test snells law of refraction.
The objective of this experiment is to use snells law to determine the index of refraction of a glass plate. Determine the critical angle at which total in ternal reflection occurs and confirm it using snells law. Explore bending of light between two media with different indices of refraction. He draws around the block and marks the position of a ray of light that travels through the block. Geometric optics snc2de snells law formal lab prelab 20 marks. An experimental demonstration of snells law of refraction. Snells law lab report snells law lab christie fosina physics regents purpose mrs greenfield 1 calculate the index of refraction for a glass block of.
Refraction refers to the bending of light as it passes from one medium to another. The bending of a light ray as it passes from air to water is determined by snell s law. In this and the following lab the light is viewed as a ray. Laser level, protractor, plate glass, plain paper, pencil, data sheet procedure. This is an example of how the lab report should be set up and what information is required. Snells law, refraction at an interface, refractive index, animations, experimental determination of n. Reflection, refraction, and total internal reflection lab report example. Snell s law lab christie fosina physics regents purpose. Snells law states that the ratio of the sine of the angle of.
Conclusion the goal of this experiment was to verify. When light travels through different mediums, it is being refracted. Snells law lab report snells law lab christie fosina. Introduction experiment%11%consisted%of%four%individual%experiments%that%each%involvedvarious topicswithinthebranchofphysicsgeneral ly%known%asoptics.
While the speed of light is constant in a vacuum, the speed of light in air and in transparent solids is somewhat less. This laboratory was designed to investigate the behaviour of light as it travels through a less dense into a denser medium. Draw the incident and emergent paths of the laser on the paper. This video explains how to perform the snells law lab. Should be clearly related to the purpose of the lab. Like with reflection, refraction also involves the angles that the incident ray and the refracted ray make with the normal to the surface at the point of refraction. The relationship is known as snells law which states that a ray of light bends. Lab 10 reflection and refraction phy 156 physics ii csi studocu. The bending of a light ray as it passes from air to water is determined by snells law. Prior to the real experimental research, this report also considers some.
In this experiment you will measure the refraction of light as it passes from one medium to another, and you will determine the index of refraction of a given liquid. This law also applies to the bending of light by lenses and to the guiding of light by the fiber optic cables that carry modern communications signals. Holscienceco 2 andson labs nc experient reflection and refraction. Snell s law and the index of refraction introduction. A report on snells law experiment 1925 words essay kitchen. Snells law practical year 11 sace physics thinkswap.
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