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Question

Physics Question on Reflection Of Light By Spherical Mirrors

The angle of minimum deviation for a prism is 40∘40^{\circ} and the angle of the prism is 60∘60^{\circ} . The angle of incidence in this position will be

A

30∘30^{\circ}

B

60∘60^{\circ}

C

50∘50^{\circ}

D

100∘100^{\circ}

Answer

50∘50^{\circ}

Explanation

Solution

Angle of incidence i=A+δm2i=\frac{A+\delta_{m}}{2}
=40∘+60∘2=50∘=\frac{40^{\circ}+60^{\circ}}{2}=50^{\circ}