alleryPolarisation of light is direct experimental evidence that light is a:
ALongitudinal wave (like sound waves)
BTransverse wave (like waves on a rope)
CParticle (like Newton's corpuscle theory)
DStationary wave with no propagation
Answer & Solution
Correct answer: B. Transverse wave (like waves on a rope)
Only TRANSVERSE waves can be polarised (vibrations perpendicular to direction of propagation).
The fact that light can be polarised proved light is a TRANSVERSE wave (electromagnetic, as Maxwell showed).
Sound, a longitudinal wave, cannot be polarised.
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