Assertion : Beats can also be observed by two light sources as in… - Vidyadip

Question

Assertion : Beats can also be observed by two light sources as in sound.
Reason : light sources have constant phase deference.

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Answer

(d) As emission of light from atom is a random and rapid phenomenon. The phase at a point due to two independent light source will change rapidly and randomly. Therefore, instead of beats, we shall get uniform intensity. However if light sources are LASER beams of nearly equal frequencies, it may possible to observe the phenomenon of beats in light.

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