A diver below the surface of a lake notices that no light appears to be coming toward her from angles greater than θ, measured from the vertical. If the index of refraction of water is 1.33, what is the angle θ?
A) 30.0°
B) 36.9°
C) 41.2°
D) 48.8°
E) 53.1°
Correct Answer:
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