4. Consider the normal Zeeman effect applied to the 3d to 2p transition. (a) Sketch an energy level diagram that shows the splitting of the 3d and 2p levels when an external magnetic field is applied. Label each state by its magnetic quantum number, mi. (b) State the magnetic quantum number selection rule and sketch the allowed transitions on your diagram. (c) Show that there are only three different transition energies permitted.

4. Consider the normal Zeeman effect applied to the 3d to 2p transition. (a) Sketch an energy level diagram that shows the splitting of the 3d and 2p levels when an external magnetic field is applied. Label each state by its magnetic quantum number, mi. (b) State the magnetic quantum number selection rule and sketch the allowed transitions on your diagram. (c) Show that there are only three different transition energies permitted.