Total Internal Reflection: A point source of light is positioned 20.0 m below the surface of a lake. What is the diameter of the largest circle on the surface of the water through which light can emerge into the air? The index of refraction of water is 1.33.

Light is incident on water(n=1.33) from air (n=1.001) at an angle of 34°. What is the angle of refraction?

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

The absolute index of refraction for a substance is 2.0. In this substance what is the critical angle to get total internal reflection/refraction for light incident on a boundary with air?  Note: speed of light in a vacuum is c = 3x108 m/s