Question

Explain Malus law for polaroids.

Answer 1

According to malus, when completely plane polarized light is incident on the analyzer, the intensity I of the light transmitted by the analyzer is directly proportional to the square of the cosine of angle between the transmission axes of the analyzer and the polarizer.

i.e. $I\propto Co{s}^2\theta$ where $I$ is the intensity and $\theta$ is the angle between the transmission axes of the analyzer and the polarizer.