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Solution


Q.

The exit surface of a prism with refractive index n is coated with a material having refractive index n2. When this prism is set for minimum angle of deviation, it exactly meets the condition of critical angle. The prism angle is _________.             [2026]
1 30°  
2 15°  
3 60°  
4 45°  

Ans.

(3)