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Physics · 2023 · 1 mark
Dual Nature of Radiation and MatterPhotoelectric Effect and Wave Theory of Light1 markUnderstandassertion reason
CBSE 2023 · Region 1 · Set 1 · Q18
Assertion (A): Photoelectric effect demonstrates the particle nature of light. Reason ( R ): Photoelectric current is proportional to intensity of…
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
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.