12. A muon has a half lifetime

and a mass of 200 me. This muon is moving with a speedof u = 0.6 c. Please calculate mean lifetime τ0, the traveling distance d measured at rest, during meanlifetime To the relativistic momentum P, the de-Broglie wavelength λd, the total energy E and kineticenergy (KE) in the unit of eV, the wavelengths of a photon with the same kinetic energy

or the samemomentum P, λp【複選題】 
(A) The mean lifetime and traveling distance measured at rest is

(B) The relativistic momentum is P = 76.66 MeV/c
(C) The de-Broglie wavelength is

(D) The total energy and kinetic energies are E = 165.77 MeV, KE = 35.55 MeV
(E) The wavelengths of photon with the same P or KE: