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.

3. The complete polarization can occur by reflection on the two interfaces: from air to water and from

water to air. Can the total internal reflection occur on the two interfaces? Why?

4. Unpolarized light of intensity 3.0 W/m² is incident on two ideal polarizing films whose transmission

axes make an angle of 60° (Fig. 8). What is the intensity of light transmitted by the second film?