Physics · 2022
JEE Main · 28 June 2022, Shift 2 · Q47
Let K_1 and K_2 be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength λ_1 and λ_2, respectively are…
Let $\displaystyle \mathrm{K}_1$ and $\displaystyle \mathrm{K}_2$ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $\displaystyle \lambda_1$ and $\displaystyle \lambda_2$, respectively are incident on a metallic surface. If $\displaystyle \lambda_1=3 \lambda_2$ then :
Official answer
(2)
$\displaystyle \mathrm{K}_1<\frac{\mathrm{K}_2}{3}$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.