A Light Ray Is Traveling in a Diamond (N =

Multiple Choice

A light ray is traveling in a diamond (n = 2.419) .If the ray approaches the diamond-air interface,what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.

A) 24.42°
B) 32.46°
C) 54.25°
D) 65.58°
E) 77.54°