# Snell's law lab answers

You will then use this same technique to study the properties of lenses which make use of refraction to focus or defocus light. Start the phet simulation entitled bending light, and click on more tools button, set the simulation as shown in the image. 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. Refraction, snells law, and total internal reflection.

You will be provided with equipment to explore the laws of refraction, how lenses work, and how to use them to make simple instruments. Title of lab purpose yes its underlined a brief statement about a question youre trying to answer or a concept or formula youre trying to prove or verify. The objective of this experiment is to use snells law to determine the index of refraction of a glass plate. Practice exercises for snell s law when answering these questions, you may want to refer to the table containing indices of refraction. This lab covers the thin lens equation, snell s law, and the lens maker s equation. Snells law and the index of refraction introduction. Use the same setup as part 1, adjusting the angle of the laser pointer until you observe total internal reflection. Let s do a slightly more involved snell s law example. Physics 4 laboratory snells law, lenses, and optical instruments. Bending light snells law refraction reflection phet. Access the answers to hundreds of snells law questions that are explained in a way thats easy for you to understand. In this lab, students use an optics ray table to measure the incident and refraction angles of a light ray traveling from air into a material with unknown. The angles of refraction that i predicted from the angle of incidences by using snells law are below on the predicted angle column. When light travels through something else, such as glass, diamond, or plastic, it travels at a different speed.

Since plastic is denser then air, the incident ray will bend away from the normal when it travels through air. Practice exercises for snells law when answering these questions, you may want to refer to the table containing indices of refraction. Snells law lab report snells law lab christie fosina. While you may not think that these ideas have anything to do with electricity and magnetism, you should remember that light is an electromagnetic wave, and hence, our understanding of optics is derived. Light is shone through a glass block at various angles. The bending of a light ray as it passes from air to water is determined by snell s law.

Refraction of light lab report alevel science marked by. You will monitor a reflected and a transmitted ray to decide whether the law of reflection andor snell s law of refraction predict your observations adequately. Refraction, snells law, and total internal reflection 32098 relevant sections in the book. Bending light snell s law refraction reflection phet solved lab 11 bending light phys 1110l conceptual physics phet simulation bending light by encouraging learning tpt solved phet simulation bending light at s lphet co. The law of refraction is also known as snells law, named for willobrord snell, who discovered the law in 1621. The aim of this experiment is to verify snells law. If any three of the four variables in the equation are known, the fourth variable can be predicted if appropriate problemsolving skills are employed. Snells law lab christie fosina 43014 physics regents mrs. The lab has students collect data and determine a connection between the ratio s that exist within snell s law hence deriving the law. The project should include some background information on snell s 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 law of refraction is also known as snell s law, named for willobrord snell, who discovered the law in 1621. Unlike reflection, refraction also depends on the media. 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. The data below show a representative set of data for such an experiment.

Snell s law shows the mathematical relationship between the angles of incidence and refraction of light when passing through two different mediums with different indices of refraction. View lab report snell s law lab report from physical s ap physics at carmel high school. Snells law advanced placement lab experiments pasco. Access the answers to hundreds of snell s law questions that are explained in a way that s easy for you to understand. Refraction, snell s law, and total internal reflection 32098 relevant sections in the book.

The lab has students collect data and determine a connection between the ratios that exist within snells law hence deriving the law. And thats why light travels in a straight line in one medium. 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. Using snells law to predict an angle value as with any equation in physics, the snells law equation is valued for its predictive ability. Lab 10 reflection and refraction phy 156 physics ii csi studocu. The angle at which this reflection or refraction occurs is determined by the law of reflection and snell s law respectively. Here we verify snell s law using a semicircular perspex block. A leaving certificate physics mandatory experiment. Snells law applies to the refraction of light in any situation, regardless of what the two media are.

The account of snells law went unpublished until its mention by christiaan. Snells law states that the ratio of the sine of the angle of. Snells law shows the mathematical relationship between the angles of incidence and refraction of light when passing through two different mediums with different indices of refraction. Full text of physics 11, snells law experiment see other formats physics experiment 6 snells law purpose. Snells law northwestern undergraduate physics labs. I am working on a physics lab where we measured the angle of incidence and angle of refraction from the air through a substance in order to find the index of refraction. Snells law lab christie fosina physics regents purpose. Problem sets to test understanding of the snells law equationangle of incidence angle of refraction calculationscritial angle calculationslight speed from index of refraction calculationsthe following set combines all three of the problem types above. View lab report snells law lab report from physical s ap physics at carmel high school. We know from snells law that, where n is the index of refraction of the medium and is the angle the light ray makes to normal. Laser level, protractor, plate glass, plain paper, pencil, data sheet. 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. Now, we can use this angle and repeat the above equation to find the angle that the light enters the solution. Describe the effect of changing wavelength on the angle 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. In addition, we will be measuring various lengths in order to demonstrate the utility of the sine. Now, one might think that the shortest path between 2 points is the line joining them. We will be measuring the angles of incidence and refraction and substituting into snells law to solve for the index of refraction of glass. 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. You will monitor a reflected and a transmitted ray to decide whether the law of reflection andor snells law of refraction predict your observations. Snells law describes how light bends when traveling from one medium to the next. Describe how the speed and wavelength of light changes in different media. When we talk about the speed of light, were usually talking about the speed of light in a vacuum, which is 3. Snells law stats that when traveling from a denser to a less dense index, the angle of incidence will be less then the angle of refraction. Physics 4 laboratory snells law, lenses, and optical. He draws around the block and marks the position of a ray of light that travels through the block. Description explore bending of light between two media with different indices of refraction.

In this lab, you will use the technique of ray tracing to verify both the law of reflection and snell s law. In this lab, you will use the technique of ray tracing to verify both the law of reflection and snells law. And they have a little laser pointer in their hand and they shine their laser pointer. In part 1 of this lab you will investigate the bending of light as it. The answer to this question was discovered by a dutch physicist called willebrord snell in 1621 and is now. Synthesis combination of all snells law calculations related content illustrations light reflection and refraction. With the block removed, the student can draw in a normal line and then measure the angle of. In this experiment, you will verify snell s law using a refraction cell and laser. Apply snells law to a laser beam incident on the interface between media. Now use snells law to determine the index of refraction of the pmma. In addition, students will investigate total internal reflection. A ray is a line that has an origin but does not have an end. 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. You will investigate fiber optics and light pipes and you will gain an elementary understanding of how lenticular lenses can be used to simulate 3d images, image motion, image morphing.

Lab 10 reflection and refraction phy 156 physics ii. Snells law in this experiment, you will verify snells law using a refraction cell and laser part 2. See how changing from air to water to glass changes the bending angle. Notice that this time, the angle of refraction is larger than the angle of incidence. Na november 12, 2019 phy112 proof of experimentation objective. An experimental demonstration of snells law of refraction. Refraction and snells law complete toolkit physics. Play with prisms of different shapes and make rainbows.

Vin addition, students will demonstrate the application of snells law, by determining the critical angle for a light beam that travels from a more dense medium to a less dense medium part l. The index of refraction does vary slightly with wavelength, but if youre using white light, which has a mixture of wavelengths, then your experiment will not be affected greatly by that. The interpretation of snells law is that, light tends to travel through the path through which it takes the shortest time. The light is bending away from the normal as it enters a rarer material.

The bending of a light ray as it passes from air to water is determined by snells law. 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. Lab writeup download the lab writeup, and be sure to read it in preparation before coming to the lab. The main one would be a little uncertainty in the angle measurements. Hence n 1 sin i n 2 sin j n 2 sin k n 1 sin i therefor i i. In this and the following lab the light is viewed as a ray. The way we found the index of refraction was graphing the inverse of the angle to the normal in the air vs the inverse of the angle to the normal in the substance mineral oil, and the slope we found was the index of refraction. Snell s law and the index of refraction introduction. Vin addition, students will demonstrate the application of snell s law, by determining the critical angle for a light beam that travels from a more dense medium to a less dense medium part l. The purpose of this lab is to test snells law of refraction. Synthesis combination of all snell s law calculations related content illustrations light reflection and refraction. Snell s law 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. Here we verify snells law using a semicircular perspex block.

Check the price hire a writer get help medium index of refraction n airvacuum 1. In this experiment, you will verify snells law using a refraction cell and laser. Laser level, protractor, plate glass, plain paper, pencil, data sheet procedure. Light is an electromagnetic disturbance and, as such, is described using maxwells equations, which expresses the relationship between the electric. 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. Snell s law lab christie fosina physics regents purpose. Rearranging, we can find the angle to normal in the glass. The purpose of this lab is lab to test snell s law of refraction.

You will then use this same technique to study the properties of lenses which make use of. Lab 9 reflection, refraction and total internal reflection. Apr 05, 2019 vin addition, students will demonstrate the application of snell s law, by determining the critical angle for a light beam that travels from a more dense medium to a less dense medium part l. As with any equation in physics, the snell s law equation is valued for its predictive ability. Lets do a slightly more involved snells law example. However, at a certain angle of incidence, the emergent ray is a reflected ray. Using snell s law, determine the constant when the angle of incidence and the angle of refraction are. 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. 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. Problem sets to test understanding of the snell s law equationangle of incidence angle of refraction calculationscritial angle calculationslight speed from index of refraction calculationsthe following set combines all three of the problem types above. This law was discovered in 1621 by the dutch astronomer and mathematician willebrord snell also called snellius. In addition, student s will investigate total internal reflection.

So i have this person over here, sitting at the edge of this pool. In this lab we are trying to prove that snells law of refraction is valid. As with any equation in physics, the snells law equation is valued for its predictive ability. 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. Then we calculate its refractive index using the slope of the graph. 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. When light travels through different mediums, it is being refracted. Ace your next assignment with help from a professional writer. Snells law experiment with glass block physics forums.

1030 1111 926 1594 719 1578 1449 1543 1377 1329 1091 526 834 1534 1498 141 564 1360 1056 683 354 669 1381 1136 639 70 707 7 112 1146 1474 1278 950 1258 187 622 1243