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Light rays from a source are incident on...

Light rays from a source are incident on a glass prism of index of refraction `mu` and angle of prism `alpha` At near normal incidence, the angle of deviation of the emerging rays is

A

`(mu-2)alpha`

B

`(mu-1)alpha`

C

`(mu+1)alpha`

D

`(mu+2)alpha`

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The correct Answer is:
b
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