Question

A muon with a lifetime of 2 × 10−6 second in
its frame of reference is created in the upper
atmosphere with a velocity of 0.998 c toward
the Earth.
What is the lifetime of this muon as mea-
sured by an observer on the Earth?
1. T = 3 × 10^−6 s
2. T = 3 × 10^−4 s
3. T = 3 × 10^−3 s
4. T = 3 × 10^−2 s
5. T = 3 × 10^−5 s

Answer 1

5