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A muon formed high in the Earth's atmosphere is measured by an observer on the Earth's surface to travel at speed v = 0.986c for a distance of 3.
A muon formed high in the Earth's atmosphere is measured by an observer on the Earth's surface to travel at speed v = 0.986c for a distance of 3.90 km before it decays into an electron, a neutrino, and an antineutrino(Ī¼ā ā eā + v + v).(a) For what time interval does the muon live as measured in its reference frame?