Lab #4 Verification of the Laws of Reflection and Refraction - Google Docs

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Apr 3, 2024

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Leosbaldo Zurita-Romero Pranav Konduru Physics 52 Lab #4 Verification of the Laws of Reflection and Refraction Intro: In this lab we will be doing various experiments involving shining an He-Ne laser through several situations. For project 1 we are shining a laser at a mirror and tracing its path with pins to help us draw. We then compare the incoming and resulting ray angles to the normal and see if they follow the Law of Reflection. In project 2 we place a translucent cube on a piece of paper and draw a line going into the cube at an angle. We then try to correctly draw the ray coming out of the cube using our point of view of the line inside of the cube. We use these results to prove the Law of Refraction. In the last project, we simply had to adjust our laser to hit two mirrors and then go through a plastic straw without hitting the inside. Data: Project 1: Φ 1 Φ 2 40 o 39 o 64 o 63 o 24 o 24 o With a full combined data set with my lab partner we graphed Φ 1 vs Φ 2 .
Leosbaldo Zurita-Romero Pranav Konduru Physics 52
Leosbaldo Zurita-Romero Pranav Konduru Physics 52 Project 2:
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Leosbaldo Zurita-Romero Pranav Konduru Physics 52 Project 3: Analysis: Project 1: After we graphed our incoming angle vs refraction angle graph, we noticed that our slope was very close to one which makes sense because the angles should be equal to each other according to the law of reflection. The equation of the line should basically be y=x. For our uncertainty we used the command LINEST to get an uncertainty of +/-.089. Our slope in full was 1.02+/-.089. Project 2:
Leosbaldo Zurita-Romero Pranav Konduru Physics 52 In project 2, the two trials went fairly well with close incoming and resulting angles of refraction within the cube. Through calculations using Snell's Law, my 4 values of n (1.64, 1.64, 1.65, 1.71) averaged to 1.66+/-.015. Using this value of n I guessed the material of the cube to be polystyrene. I was also guessing quartz but that material seemed to be a little too opaque. I decided to ignore my partner's data because he seemed to have performed the experiment incorrectly and got a random index of refractions that were not making complete sense. Partner Data: Project 3: We managed to guide our laser past two mirrors and then through a plastic tube without its path getting disrupted. This project allowed us to see how a ray of light can be redirected in various different ways without it being diffracted by the mirrors. It demonstrated the strict rules that light follows and how its physical properties discussed in a physics classroom can be seen in the real world. Conclusion: In the end, both the Law of Refraction and the Law of Reflection held up to be true after performing the experiments with only little error. A slight inaccuracy in the first project's slope
Leosbaldo Zurita-Romero Pranav Konduru Physics 52 was because placing the pins at the correct spots was really tedious. The pins themselves weren't very straight either so the slight bends on them could have caused misplacements. The drawing in project 2 had to be very precise in order to get a fixed index of refraction for the cube. Drawing the resulting ray out of the cube was the most challenging part as we had to perfectly align with an image that wasn't entirely there leading to miscalculated values of n. The final project was a more interacting experiment that showed us how a laser can be maneuvered into various directions and still have the precision to go through a small pathway like a plastic rod without disruption.
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