Suppose one of your classmates (let’s call him student A) is performing the experiment. In his setting he lets the laser enter the flat side of the Plexiglas semi-circle and draws the following diagram on a whiteboard:

Determine the angle of incidence and angle of refraction in student A’s whiteboard diagram?

Calculate the index of refraction, n, of the Plexiglas using the measurements made above and Snell’s Law. Show your work on your notebook (take a snapshot and paste it here). Also write your final answer at the end.
Suppose the incident angle in the problem is 17 degrees. Using the index of refraction, you calculated above to find the refracted angle. On your notebook show your work for finding the refracted angle and include a picture.
The index of refraction of water is n=1.33. As shown in the below diagram, if a laser beam is incident on the outside of a clear bucket of water 10 cm from the bottom and hits the bottom 30 cm from the side of the bucket, what was the angle of incidence (Hint: Using the triangle made in the diagram will be useful)? Treat the bucket sides as flat surfaces. Work out this problem on your notebook and include a picture of your solution here. In addition, record your answer here.