The Balmer series for atomic hydrogen is observed in the following spectral region :

The Balmer series for the H-atom can be observed.

The Balmer series for the H-atom can be observed ...

Balmer series of hydrogen atom lies in

Balmer series of hydrogen spectrum lies in which region?

The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 Å. If the wavelength of the spectral line in the Balmer series of singly-ionized helium atom is 1215 when electron jumps from n_2 to n_1 , then n_2 and n_1 , are