CBSE 2025 · Region 7 · Set 1 · Q8 · 1 mark
The frequency of a photon of energy $\displaystyle 1 \cdot 326 \mathrm{eV}$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 3.20 \times 10^{14} \mathrm{~Hz}$
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.