If Paschen series of hydrogen spectrum has 4 lines then number of lines in Balmar sereis will be:

The value of n_(1) for Paschen series of hydrogen spectrum is (n_(1) = orbit number in which electron falls)

The ratio of the frequency corresponding to the third line in the lyman series of hydrogen atomic spectrum to that of the first line in Balmer series of Li^(2+) spectrum is

When a photon corresponding to the third line of Paschen series of hydrogen spectrum is emitted, determine the change in angular momentum of the electron associated with the process.

The series of hydrogen spectrum lying in infrared region is Paschen, Brackett and _____ series.