Question

What is the difference between polarised light and unpolarished light based on the direction of electric vector $\left(\overrightarrow{E}\right)$?

Answer 1

$\left(1\right)$ In an unpolarised light, the vibrations of the electric vector occur symmetrically in all possible directions in a plane perpendicular to the direction of propagation of light.
$\left(2\right)$ In polarised light, the vibrations of the electric vector are in a plane perpendicular to the direction of propagation of light and they are confined to a single direction.