If you have a set of H-atom wave functions and wish to evaluate what would be the measured value of the electric dipole moment in the n=2, l=1, m=0 state,
i. Describe how you would get a value for the observed dipole moment? [Dipole moment: µ = Si qiri , where qi is the charge on particle i and ri is its position.]
ii. Which postulate (or formula and meaning) does this require?
b. How would this be different for evaluating the angular momentum? Why?