A prism of refractive index has refracting angle

PHYSICS · Single correct · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

A prism of refractive index

\sqrt{2}

has refracting angle

60^\circ

. In order that a ray suffers minimum deviation, it should be incident at an angle of (1)

45^\circ

(2)

90^\circ

(3)

30^\circ

(4) None of these