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A ray of light is incident on a thin pri...

A ray of light is incident on a thin prism of refractive index 1.5 and suffers a deviation of `40^@`. If the prism is cut into two equal parts so that angle of prism is reduced to half, then the deviation suffered by the same ray will be :

A

`40^@`

B

`20^@`

C

`(40/1.5)^@`

D

`(20/1.5)^@`.

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