A light ray is incident normally on the face AB of a right-angled prism `ABC (mu==1.50)`
Channel: Doubtnut
Date: 2020-06-28

A light ray is incident normally on the face AB of a right-angled prism `ABC (mu==1.50)` as shown in figure. What is the largest angle `phi` for which the light ray is totally reflected at the surface AC ?