Which effect provides direct experimental evidence that light is a transverse, rather than a logitudinal wave motion?

Options

A. (a) Light can be diffracted
B. (b) Two coherent light waves can be made to interfere.
C. (c) The intensity of light from a point source falls off inversely as the square of the distance from the source.
D. (d) Light can be polarised.

Answer

D

Explanation

Sound, a logitudinal wave, can be diffracted, can be made to interfere, whose intensity falls off inversely as the square of distance from the source, but can not be polarised.
Light a transverse wave, can be diffracted, can be made to interfere, whose intensity falls of inversely as the square of distance from the source, can also be polarised.