QUESTION TEXT:-
A right prism is to be made by selecting a proper material and the angles A and B `(BleA)` as shown in figure. It is desired that a ray of light incident normally on AB emerges parallel to the incident direction after two internal reflection.a. What should be the minimum refractive index `mu` for this to be possible? b. `For mu=5/3` is it possible to achieve this with the angle A equl to 60 degrees?
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