The negative muon has a charge equal to that of an electron but a mass that is 207 times as great. Consider a hydrogen-like atom consisting of a proton and a muon.
(1) What is the reduced mass of the atom?
(2) What is the ground-level energy, in eV?
(3) What is the wavelength of the radiation emitted in the transition from the n=2 level to the n=1 level?