A corner reflector is shown in the figure. This is a prism which uses total internal reflection at points A and B to reflect light back toward its source. In this specific case, the angle of incidence at point A is theta=36 degrees and the angle of the first surface with the horizontal is a=13 degrees.
(a) What is the angle B, in degrees, if we want to make sure the incoming and outgoing rays are parallel to each other?
(b) What is the minimum index of refraction for the material used to make this corner reflector?
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