NEET Physics Interference Assertion Reason Question
Assertion (A): Two coherent sources are necessary to produce a sustained interference pattern. | Reason (R): Coherent sources have a constant phase difference over time.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context explains that coherent sources, which maintain a constant phase difference, are needed for sustained interference, thus supporting both the assertion and reason.
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