A hydrogen atom is excited from its ground state to the state with n = 4.
(a) How much energy must be absorbed by the atom? Consider the photon energies that can be emitted by the atom as it de-excites to the ground state in the several possible ways.
(b) How many different energies are possible; what are the?
(c) Highest,
(d) Second highest,
(e) Third highest,
(f) Lowest,
(g) Second lowest, and
(h) Third lowest energies?