Imagine a hydrogen atom in which the electron has no spin [so that the only magnetic moment is the orbital magnetic moment given by (9.35)]. The atom is placed in a magnetic field B=1.5T B=1.5 T along the z axis.
(a) Explain the effect of the B field on the 1s and 2p states of the hypothetical atom. Sketch the energy levels.
(b) When B=0, there is a single spectral line corresponding to the 2p→1s transition. How many lines does this become when
B is switched on?
(c) What is the fractional separation Δf/f0 between adjacent lines?