(i) ln a beam of unpolarized light, the vibrations of light vectors are in all directions in a plane perpendicular to direction of propagation. In polarised light, these vibrations are only along one direction.
(ii) A polaroid consists of a long chain of molecules aligned in a particular direction. lt polarises light as it allows only one component of tight (electric vector parallel to the pass-axis) to pass through it while the other component is absorbed.
(iii) The observer receives scattered light corresponding to only one of the two sets of accelerated charges, i.e. electron oscillating perpendicular to the direction of propagation.
