A Light Ray in Air Strikes a Glass Plate Whose $1.42$

A light ray in air strikes a glass plate whose index of refraction is $1.42$ . Some of the light reflects off the surface of the plate, but most of it enters the glass. If the angle of refraction is one-half the angle of reflection, the angle of refraction is closest to which one of the following angles?

A) $37 ^ { \circ }$
B) $41 ^ { \circ }$
C) $43 ^ { \circ }$
D) $39 ^ { \circ }$
E) $45 ^ { \circ }$

Correct Answer:

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