1. A light ray from an underwater source strikes the surface of a pond at an angle of incidence of 20°. What happens? Find the angle of refraction.
2. A light ray in airstrikes an air-water interface at an angle of incidence of 50°. What happens? What is the angle of refraction?
3. A light ray in airstrikes the interface between air and an unknown material at an angle of incidence of 15° and has an angle of refraction of 7°. What is that material’s index of refraction?
4. Calculate the critical angle between acrylic (n = 1.49) and water (n = 1.33).
5. The index of refraction of corn oil is 1.47. What is the speed of light in corn oil. (speed of light in vacuum is 3 X 10^9 m/s)
