020. a spectral line due to a transition from an electronic state p to an s state splits into three zeeman lines in the presence of a strong magnetic field. at

020. A spectral line due to a transition from an electronic state p to an s state splits into three Zeeman lines in the presence of a strong magnetic field. At intermediate field strengths the number of spectral lines is (a) 10 b) 3 (c) 6 (d) 9 Ans. (a)