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In a thin prism of glass (refractive ind...

In a thin prism of glass (refractive index 1.5), which of the following relations between the angle of minimum deviations `delta_(m)` and angle of prism r will be correct?

A

`delta_(m)=r`

B

`delta_(m)=1.5r`

C

`delta_(m)=2r`

D

`delta_(m)=r/2`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Angle of minimum deviation in prism,
`delta_(m)=(µ-1)A=(µ-1)(2r) (thereforer=A//2)`
`=(1.5-1)(2r)=0.5xx2r=r`
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