A ray of light is incident at an angle `alpha` on the boundary separating two transparant media. It
Channel: Doubtnut
Date: 2021-11-08

A ray of light is incident at an angle `alpha` on the boundary separating two transparant media. It transmited in other medium. If the angle incidence is increased very slightly, the ray gets reflected in the same medium. The different between angles of deviation in the two cases will close to