ray of light enters a thick plastic block from air at an angle of 32° with respect to the normal and continues in the plastic at an angle of 23° with respect to the normal.  What is the index of refraction of the plastic?     1.11     0.89     1.36     1.28

A ray of light in air crosses a boundary into transparent stuff whose index of refraction is 2.29. The angle of refraction in this situation is 25.89 X degrees.

A ray of light is incident on a pool with three layers of liquid in it at an angle of 75.0°. The top layer is 20.0m deep and has an index of refraction of 1.33. The middle layer is also 20.0m deep and has an index of refraction of 2.00. The bottom layer is 25.0m deep and has an index of refraction of 2.50. At the bottom of the pool there is a mirror that reflects the light back towards the surface. Calculate the time that the ray of light is in the pool, in other words the time taken between points A and B. Use the speed of light in a vacuum c = 3 * 108 m/s. Question 2: Waves n₁ = 1.00 N₂ = N22 1.33 n3 = 2.00 75.0° LA n4 = 2.50 mirror B 12 = 20.0m 13 = 20.0m 14 = 25.0m

Problem 9:   A ray of light is incident on an air/water interface. The ray makes an angle of θ1 = 29 degrees with respect to the normal of the surface. The index of the air is n1 = 1 while water is n2 = 1.33.  Part (a)  Choose an expression for the angle (relative to the normal to the surface) for the ray in the water, θ2.  Part (b)  Numerically, what is the angle in degrees?