`1^(st)` excitation Potential of a hydrogen like sample is 15 volt. If all the atoms of the sample a
Channel: Doubtnut
Date: 26/01/2020

`1^(st)` excitation Potential of a hydrogen like sample is 15 volt. If all the atoms of the sample are in `2^(nd)` excited state then find the `K.E.` in `eV` of the electron ejected if a photon of energy `(65)/(9)eV` is supplied to this sample.