A H-like species is in some excited state "A" and on absorbing a photon of energy 10.2eV gets promoted
to new state B. When the electrons from state "B" return back to ground state directly or indirectly,
photons of a fifteen different wavelengths are observed in which only mine photon have energy greater
than 10.2.eV.
[Given : hc=1240 eV-nm]
Find the maximum and minimum wavelenght (in nm) of the emitted fifteen photons.

Options

A. `104.2,288.88`
B. `288.88,104.2`
C. `828.88,10.42`
D. None of these

Answer

C

Explanation

`lambda_(min)=(1240)/(119)=10.42" "E_(6)-E_(1)=119`
`lambda_(min)=(1240)/(1.496)=828.88" "E_(6)-E_(5)=1.496`