An Aquarium Contains a 5-Cm Layer of Water (N =

Multiple Choice

An aquarium contains a 5-cm layer of water (n = 1.333) floating on top of carbon tetrachloride (n = 1.461) . If the angle of incidence into the water from the carbon tetrachloride is 20°, what is the angle of refraction into the air?

A) 20°
B) 30°
C) 38°
D) 69°
E) 26°