CBSE 2024 · Region 2 · Set 1 · Q8 · 1 mark
The work function for a photosensitive surface is $\displaystyle 3 \cdot 315 \mathrm{eV}$. The cut-off wavelength for photoemission of electrons from this surface is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 375$ nm
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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.