A photon  of energy 10.2 eV corresponds to light of wavelength `lamda_(0)`. Due to an
Channel: Doubtnut
Date: 2021-11-10

A photon  of energy 10.2 eV corresponds to light of wavelength `lamda_(0)`. Due to an electron transition from n=2 to n=1 in a hydrogen atom, light of wavelength `lamda` is emitted. If we take into account the recoil of the atom when the photon is emitted.