A ray PQ incident on the refracting face BA is refracted in the prism BAC as shown in the figure
Channel: Doubtnut
Date: 2020-08-30

A ray PQ incident on the refracting face BA is refracted in the prism BAC as shown in the figure and emerges from the other refracting face AC as RS such that AQ = AR. If the angle of prism `A = 60^(@)` and the refractive index of the meterial of prism  is `sqrt2` , then the angle of deviation of the ray is