Physics, Relativity, Muon, Quantum Physics, Particle Physics.
energy of the incoming photons. II. The Enigma of Muons Reaching Earth: The enigma is: a muon, with a mean lifespan of 2.2 microseconds and travelling with a speed as high as 0.999𝑐 can travel only a distance of 0.999 × 300000 × 2.2 × 10 ^ -6 = 0.659 km = 659 m before decaying. With this magnitude