The energy eigenstates of the hydrogen atom are described by Schrödinger wavefunctions ?(r), where the energy of the ground state ?100(r)=-13.6eV. (You don't need the form of these functions to work out this problem). Suppose a hydrogen atom is in the state 0.8?100+0.6i?211.
(A) Determine the expectation value of the energy.
(B) Determine the expectation value of L^2. (The square of the angular momentum ventor)