Observation, Observing, Universe, Electromagnetic Radiation.
dilation did not occur, only about 1 in 3 000 000 would reach the ground. However, due to its relativistic speed, the muon’s clock, as observed by us, is running slow by a factor of about 5, so its effective half-life is 7.8 μs. As a result, 150 000 rather than a single muon out of an initial 3 000