A pronton captures a free electron whose K.E. is zero & from a hydrogen atom of lowest energy-level
(n=1) . If a photons is emitted in the process, what will be the wavelenght of radiation ? In which region
of electromagetic spectrum, will this radiation fall ? (Inoisation potential of hydrogen =13.6volt,
`(h=6.6xx10^(-34)K//S,C=3.0xx10^(8)m//s)`

Answer

`910Å;U.V`

Explanation

`DeltaE=13.6=(Z^(2))/(n^(2))=13.6 eV`
`DeltaE=(hc)/(lambda)=13.6xx1.6xx10^(-19)`
`(lambda)=910Å`