I am working on a problem about hydrogen in a uniform electric field. I have solved for the first order correction to the wavefunction to be f(r)*cos(theta). But then it asks about what "physical process" it represents by having the angular dependence cos(theta). I am thinking that cos(theta) actually is included in expression for 2pz. And I think the combination of 2pz and 1s creates a degeneracy. Is that right that the degeneracy is the thing it asks about the physical process? Thanks!