Question

The angle of incidence of a light beam onto a reflecting surface is continuously variable. The reflected ray in air is completely polarized when the angle of incidence is 48.0degrees . What is the index of refraction of the reflecting material?

Answer 1

Answer

the index of refraction of the reflecting material is given by

$n=\tan(\theta_p) \\=\tan(48.0)\\=1.11$