A beam of light `AO` is incident on a glass slab `(mu=1.54)` in a direction as shown in figure.
Channel: Doubtnut
Date: 2020-08-23

A beam of light `AO` is incident on a glass slab `(mu=1.54)` in a direction as shown in figure. The reflected ray `OB` is passed throught a Nicol prism. On viewinf through a Nicole prism, we find rotating the prism that `(tan^(-1)1.54=57^(@))`