CBSE 2024 · Region 5 · Set 1 · Q15 · 1 mark
Assertion (A) : In a Young's double-slit experiment, interference pattern is not observed when two coherent sources are infinitely close to each other.
Reason (R) : The fringe width is proportional to the separation between the two sources.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
If Assertion (A) is true but Reason (R) is false.
Wave OpticsInterference of Light Waves and Young’s ExperimentAnalyseassertion_reasonmedium
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CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.