A scuba diver in a lake aims her underwater spotlight at the lake surface

surface-beam

#1

A scuba diver in a lake aims her underwater spotlight at the lake surface.

(a) If the beam makes a 78° angle of incidence with respect to a normal to the water surface, is it reflected, transmitted, or both?

Find the angles of the reflected and transmitted beams (if they exist, enter 0 if they do not exist)

(b) If the beam makes a 34° angle of incidence with respect to a normal to the water surface, is it reflected, transmitted, or both?

Find the angles of the reflected and transmitted beams (if they exist, enter 0 if they do not exist).

Answer:

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