The negative muon is a subatomic particle with the same charge as the electron but a mass that is about 207 times greater: m(u)~ 207 m (electron).
A muon can be captured by a proton to from a "muonic hydrogen atom" with energy and radius given by the Bohr model, expect that m (electron) must be replaced by m(u).
(a) Determine the radius and energy of the first Bohr orbit in a muonic hydrogen atom?
(b) Determine the wavelength of the Lyman alpha line in muonic hydrogen?