Physics · 2023
JEE Main · 11 April 2023, Shift 1 · Q34
A metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V_o. If the same surface is illuminated with radiation of…
A metallic surface is illuminated with radiation of wavelength $\displaystyle \lambda$, the stopping potential is $\displaystyle \mathrm{V}_o$. If the same surface is illuminated with radiation of wavelength $\displaystyle 2 \lambda$, the stopping potential becomes $\displaystyle \frac{\mathrm{V}_o}{4}$. The threshold wavelength for this metallic surface will be
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle 3 \lambda$
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.