Why is that in an external magnetic field(uniform) the degeneracy of d,f orbitals is lost but the degeneracy of p orbitals remain intact if the main cause of losing degeneracy is the difference in energy of differently oriented orbitals in the magnetic field?
My textbook states that the energy of the p orbitals will split in a magnetic field. (Physical Chemistry, McQuarrie, p.210)
Any energy that belong to orbitals with non-zero angular moment (ie. anything, except s orbitals) will split in magnetic field.