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A ray of light is incident at angle of i...

A ray of light is incident at angle of incident ,I, on one face of a prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is `mu` the angle of incidence i, is nearly equal to:

A

`(muA)/2`

B

`Amu`

C

`A/(2mu)`

D

`muA`

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