A Flashlight Beam Makes an Angle of 60° with the Plane

A flashlight beam makes an angle of 60° with the plane of the surface of a calm lake before it enters the water. In the water what angle does the beam make with the plane of the surface? The
Index of refraction of water is 1.33.

A) $30 ^ { \circ }$
B) $22 ^ { \circ }$
C) $68 ^ { \circ }$
D) $0 ^ { \circ }$
Е) $60 ^ { \circ }$

Correct Answer:

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