The Proper Mean Lifetime of a Muon Is 2

question 29

Multiple Choice

The proper mean lifetime of a muon is 2.2 × 10^-6 s. A beam of muons is moving with speed 0.6c relative to an inertial observer. Approximately how far will a muon in the beam travel, on average, before it decays?

• A)288 m
• B)360 m
• C)500 m
• D)600 m
• E)800 m

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