A photon of energy 10.2 eV corresponds ...

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.

A

`lambda lt lambda_(0)`

B

`lambda gt lambda_(0)`

C

`lambda=lambda_(0)`

D

None of these

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The correct Answer is:

B

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