A diver shines light upward to the surface of a smooth pond at 20° to the normal. Most light passes into the air above while the part that reflects back into the water makes an angle to the normal of
A)less than 20°.
B)20°.
C)more than 20°.
D)all refracts, none reflects.

Question

Quizplus · Accepted Answer

The angle of reflection equals the angle of incidence, so if the light hits the surface at 20° to the normal, the reflected light will also make an angle of 20° to the normal.

A Diver Shines Light Upward to the Surface of a Smooth