Question

Write malus law.

Answer 1

Malus Law : When a beam of completely plane polarized light is passed through analyzer, the intensity T of transmitted light varies directly as the square of the cosine of the angle '$\theta$' between the transmission directions of polarizer & analyzer. This statement is know as law of malus Mathematically
$I\propto co{s}^2\theta$
$I=I_{o}co{s}^2\theta$