A Light Ray Strikes the Surface of Sapphire (N = $^{\circ}$

Multiple Choice

A light ray strikes the surface of sapphire (n = 1.77 ) at an angle of incidence of 40.0 $^{\circ}$ .What angle of refraction results?

A) 21.3 $^{\circ}$
B) 50.0 $^{\circ}$
C) 59.7 $^{\circ}$
D) 57.0 $^{\circ}$
E) 17.7 $^{\circ}$