A negatively charged muon (µ¯) has the same charge as as electron, but it is heavier. Imagine a hydrogen-like atom in which the electron is replaced by a muon. Such atoms are called muonic atoms, and they can be produced in the laboratory. Assume that such an atom can be described in the same way as the normal Bohr atom. (a) What is the ground state energy of a muonic hydrogen atom? (b) What is the radius of the muon's orbit in the ground state of a muonic hydrogen atom? (c) What is the radius of the muon's orbit in the ground state of a muonic lead atom (Z = 82), i.e., a lead nucleus with one muon (and no electrons) orbiting it? Compare this with the radius of the lead nucleus (about 7 fm). What does this tell you about the muon's "orbital path?"

A negatively charged muon (µ¯) has the same charge as as electron, but it is heavier. Imagine a hydrogen-like atom in which the electron is replaced by a muon. Such atoms are called muonic atoms, and they can be produced in the laboratory. Assume that such an atom can be described in the same way as the normal Bohr atom. (a) What is the ground state energy of a muonic hydrogen atom? (b) What is the radius of the muon's orbit in the ground state of a muonic hydrogen atom? (c) What is the radius of the muon's orbit in the ground state of a muonic lead atom (Z = 82), i.e., a lead nucleus with one muon (and no electrons) orbiting it? Compare this with the radius of the lead nucleus (about 7 fm). What does this tell you about the muon's "orbital path?"