When a Light Ray in Air Enters Glass with Index $^{\circ}$

Multiple Choice

When a light ray in air enters glass with index of refraction 1.60,what is the greatest angle of refraction that can occur?

A) 90.0 $^{\circ}$
B) 56.2 $^{\circ}$
C) 52.2 $^{\circ}$
D) 38.7 $^{\circ}$
E) 0.0 $^{\circ}$