Distinguish b/w unpolarised light and linearly …

In a beam of unpolarized light, the vibrations of light vectors are in all directions in a plane perpendicular to the direction
of propagation.

In the linearly polarised light, the vibrations of light take place in a particular direction, perpendicular to the direction of
wave motion.
Polarized light can be distinguished, from unpolarized light, when it is allowed to pass through a Polaroid. Polarized light
does can show the change in its intensity, on passing through a Polaroid; intensity remains same in case of unpolarized
light.

When the unpolarised light wave is incident on a polaroid, then the electric vectors along the direction of its aligned
molecules, get absorbed; the electric vector, oscillating along a direction perpendicular to the aligned molecules, pass
through. This light is called linearly polarized light.