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Angle of a prism is 30° and its refracti...

Angle of a prism is 30° and its refractive index is V2 and one of the surface is silvered. At what angle of incidence, a ray should be incident on one surface so that after reflection from the silvered surface, it retraces its path:

A

`30^@`

B

`60^@`

C

`45^@`

D

`sin^(-1)sqrt(1.5)`

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