Physics · Modern Physics
An electron and a proton are separated by a large distance. The electron starts approaching the proton with a kinetic energy of 3 eV. The proton captures the electron and forms a hydrogen atom in its second excited state. The resulting photon is incident on a photosensitive metal of threshold wavelength 4000 Å. What is the maximum kinetic energy of the emitted photoelectron?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17.61 eV
- 21.41 eV✓
- 33.30 eV
- 4No photoelectron would be emitted
Correct answer
1.41 eV
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