If a prism has angle 60° and critical angle 41°, what is r at first face for TIR at second face? - ELECTRONIC DEVICES Quiz | GKFix.in

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Question

If a prism has angle 60° and critical angle 41°, what is r at first face for TIR at second face?

A. 15°
B. 18°
C. 19°
D. 20°