1. Calculate the transition ratio between the 2P-1S and 3P-2S states of the hydrogen.
2. Find the first order correction in the energy for the states n = 3 of the hydrogen atom subject to a constant electric field in the z direction (effect Stark). What are the states associated with each disturbed level?
If you can help me with any of this, or if you know a good quantum physiscs book where i can find this