JEE PHYSICS MCQ: WAVE OPTICS

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Assertion (A) : For two sources to be coherent phase difference between two waves at all points should be same.

Reason (R) : Two different light sources are never coherent.

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Correct option: D

If Assertion is false but the Reason is true.

Option D is correct because the assertion is false, as phase difference needs to be constant, not necessarily the same at all points, and the reason is true, as two different light sources are never perfectly coherent.

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