Assign each of the following observed vacuum wavelengths to a transition between two hydrogen- atom levels:
656.47 nm, 486.27 nm, 434.17 nm, 410.29 nm.........(Balmer series)
Predict the wavelengths of the next two lines in this series and the wavelength of the series limit. (Balmer was a Swiss mathematician who, in 1885, came up with an empirical formula that fitted lines of the hydrogen spectrum.)