Caclulate (I) is the wavelength and (ii) the frequecny of the `H_(beta)` line of the second line of Bolmer series for some hydrogen.

Explanation

(i) `H_(beta)` line of Balmer series corresponds to the transition from n=2 to n=2 level . Unign Eq. (xiii), the corresponding wavelength for `H_(beta)` line is,

`(1)/(lambda)=(1.097xx10^(7))((1)/(2^(2))-(1)/(4^(4)))=0.2056xx10^(7)`
`:. " " lambda=4.9xx10^(-7)m`
(ii) Further , `f=(c)/(lambda)=(3xx10^(8))/(4.9xx10^(-7))=6.12xx10^(14)` Hz