Figure P35.52 shows a top view of a square enclosure. The inner surfaces are plane mirrors. A ray of light enters a small hole in the center of one mirror.
(a) At what angle θ must the ray enter in order to exit through the hole after being reflected once by each of the other three mirrors?
(b) What If? Are there other values of & for which the ray can exit after multiple reflections? If so, make a sketch of one of the ray€™s paths.