CBSE 2023 · Region 1 · Set 1 · Q18 · 1 mark
Assertion (A) : Photoelectric effect demonstrates the particle nature of light. Reason ( $\displaystyle R$ ) : Photoelectric current is proportional to intensity of incident radiation for frequencies more than the threshold frequency.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Dual Nature of Radiation and MatterPhotoelectric Effect and Wave Theory of LightUnderstandassertion_reasonmedium
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CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.