Questions and Exercises 1. Derive Eq. (2) using Snell's law. 2. Sunlight reflects off the smooth surface of an unoccupied pool. (a) At what angle of reflection is the light completely polarized? (b) What is the corresponding angle of refraction for the light that is transmitted (refracted) into the water? (c) At night an underwater floodlight is turned on in the pool. Repeat parts (a) and (b) for rays from the floodlight that strike the smooth surface from below. a )