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^(@))`

Options

A. the intensity si reduced down to zero and remains zero
B. the intensity raduces down some what and aganin.
C. There is not change in intensity.
D. The intensity gradually reduces to zero and then again increases.

Answer

D