Light is reflected from the surface of a lake (n = 1.33).What is the angle of incidence for which the reflected light is 100 percent polarized?
A)53º
B)49º
C)45º
D)41º
E)37º

Question

Quizplus · Accepted Answer

For light reflected from a non-conducting surface (like the surface of a lake), the angle of incidence at which light is 100% polarized is given by Brewster's Law: tanθp = n, where θp is the polarizing angle and n is the refractive index of the medium the light is entering from. 
Plugging in n = 1.33 (the refractive index of water) gives us tanθp = 1.33, which gives us θp ≈ 53º. 
Therefore, the correct choice is A).

Light Is Reflected from the Surface of a Lake (N