Question: When bouncing off a flat mirror, a light ray travels by a minimum time path. (a) For what shape mirror would the paths of all

When bouncing off a flat mirror, a light ray travels by a minimum time path.

(a) For what shape mirror would the paths of all bouncing light-rays take equal times?

(b) Is there a shape for which a bouncing ray would take a path of greatest time, relative to nearby paths?

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