Atoms

Balmer series is the series in which the spectral lines correspond to the transition of electron from some higher energy state to the lower energy state corresponding to . Therefore, for Balmer series, and
Frequency, of 1 st spectral line of Balmer
series
Or (i)
Frequency of 2 nd spectral line of Balmer series

or (ii)
From Eqs. (i) and (ii), we have

KE of an electron in th orbit : and
PE of an electron in th orbit :
When an electron passes from state to



or