A H-like species is in some excited state "A" and on absorbing a photon of energy 10.2eV gets promotedto new stateB. When the electrons from state "B" return back to ground statedirectly 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] Determine orbit number of state "A" of hydrogen like speci.

A H-like species is in some excited state "A" and on absorbing a photo

1.	A H-like species is in some excited state "A" and on absorbing a photon of energy 10.2eV gets promotedto new stateB. When the electrons from state "B" return back to ground statedirectly 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] Determine orbit number of state "A" of hydrogen like speci.
Answer» 2 3 4 5 Solution :`A=n_(1),B=n_(2)` `n_(2)(n_(2)-1)=30rArrn_(2)=6` `10.2=13.6""Z^(2)[(1)/(n_(2))-(1)/(36)]` `Z& n_(1)` is an INTEGRE `thereforeZ=3,"" n_(1)=3=A`