Question

If unpolarized light falls on a glass plate $(\mu =1.54)$ at an incidence angle of ${57}^{\circ }$, the reflected light is:

• A. Unpolarized
• B. Completely polarized with dot vibrations
• C. Completely polarized with dash vibrations
• D. Partially polarized with $15$% dot and $85$% dash vibrations

Answer 1

The correct option is B Completely polarized with dot vibrations

As, ${\tan }^{-1}\left(1.54\right)={57}^0$, the light falling on the glass plate at this angle, undergo total internal reflection, and gets completely plane-polarized.

The reflection causes polarization of light, with vibrations parallel to the plane of glass plate. So it is represented with the dot vibrations.