CBSE Class 12 · 2016 · Delhi · Wave OpticsShort Answer

State Brewster's law.

Answer: At the polarising angle $i_{B}$ , $tan i_{B} = μ$ , and the reflected light is completely plane polarized.

Solution

Brewster’s law:

when unpolarized light is incident on a transparent medium at the polarising angle

i_{B}

, the reflected light is completely plane polarized, and the tangent of this angle equals the refractive index of the medium:

μ = tan i_{B}

At this angle the reflected and refracted rays are mutually perpendicular.

CBSE Class 12 Board · 2016 · Delhi · Subjective