NEET Physics Question - Wave Optics - Young's Double Slit Experiment

Assertion (A): Incoherent sources do not produce an interference pattern.

Reason (R): Light from two coherent sources that are not in phase does not produce an interference pattern.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true: Incoherent sources have rapidly fluctuating phase differences, resulting in an average uniform intensity rather than a stable interference pattern.

Reason (R) is false: Coherent sources, even if not in phase (i.e., having a constant non-zero phase difference), will still produce a stable interference pattern, though its position might shift. Hence, (A) is true, (R) is false.

Rankers Physics

Incoherent sources and interference

Solution:

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