Physics · 2021
JEE Main · 27 July 2021, Shift 2 · Q16
An electron and proton are separated by a large distance. The electron starts approaching the proton with energy 3 eV. The proton captures the…
An electron and proton are separated by a large distance. The electron starts approaching the proton with energy $\displaystyle 3$ eV. The proton captures the electron and forms a hydrogen atom in second excited state. The resulting photon is incident on a photosensitive metal of threshold wavelength $\displaystyle 4000 \AA$. What is the maximum kinetic energy of the emitted photoelectron?
Official answer
(4)
1.$\displaystyle 41$ eV
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.