Question

Sound waves do not exhibit polarization because, unlike light waves, they are not:
(A). Longitudinal
(B). Coherent
(C). Dispersive
(D). Transverse
(E). refractive

Answer 1

Polarisation of the waves means transforming the unpolarised wave into the polarised wave by some appropriate means. Polarisation is then a phenomenon which will be applicable for the transverse waves only, it does not apply to the longitudinal waves.

Complete step-by-step answer :
The polarised light will be the light which is having the vibrations occurring in the same plane. Thought when the light gets polarised then its intensity reduces by half of its previous intensity.
So, to make the wave polarised we have to put the polariser in front of the wave. This polariser will restrict the vibrations of the wave in a single plane that means the wave which has the vibrations perpendicular to the path of the light in which its propagation is taking place will be having the vibrations in a single plane after passing through the polariser.
And as we know the wave of which the vibrations are perpendicular to the propagation are transverse waves and the waves which are having their vibrations parallel to the propagation of the wave are longitudinal waves. We also know that the light wave is a transverse wave while a sound wave is a longitudinal wave. So a sound wave is not a transverse wave. Hence this is the reason because of which sound waves do not exhibit polarization, unlike light waves.
So, option (D) is the correct answer.

Note : Polarised light has a number of applications which makes the human life easy and comfortable. So, some of the applications of the polarised light are as follows:
Polaroid sunglasses
Liquid crystal display (LCD)
Quantum cryptography
3D effects
Polarisation of the radio and microwave signals