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?

Options

A. `delta_(m) = r`
B. `delta_(m) = 1.5`
C. `delta_(m) = 2r`
D. `delta_(m) = r//2`

Explanation

Angle of minimum deviation in prism,
`delta_(m)=(mu-1)A=(mu-1)(2r)" "(because r=A//2)`
`=(1.5-1)(2r)=0.5xx2r=r`