The wavelengths of the Na yellow doublet (2p 2S) are equal to 589.59 and 589.00 nm. Find:

Question:

The wavelengths of the Na yellow doublet (2p → 2S) are equal to 589.59 and 589.00 nm. Find:
(a) The ratio of the intervals between neighbouring sublevels of the Zeeman splitting of the terms 2Pal 2 and 2Pal 2 in a weak magnetic field;
(b) The magnetic field induction B at which the interval between neighbouring sublevels of the Zeeman splitting of the term is η = 50 times smaller than the natural splitting of the term 2P.