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NEET UG PHYSICS MCQ: WAVE OPTICS
1
Medium
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Analyzing
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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.
Reason (R) : Two different light sources are never coherent.
View answer and explanation
Correct option: D
If Assertion is false but the Reason is true.
Option D is correct. The assertion is false because coherent sources can have a constant phase difference, not necessarily zero. The reason is true because two independent light sources cannot maintain a constant phase relationship.
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