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# At what angle should a ray of light be incident on the face of a prism of refracting angle 60∘ so that it just suffers total internal reflection at the other face. The refractive index of the prism is 1.524.40∘50∘30∘60∘

A
40
B
60
C
30
D
50
Solution
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#### sinc=1μ=11.524=0.65orc=40∘30′

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