A muon is a high-energy version of an electron. In just
2.2 µs (2.2x10-6 s) a muon at rest
decays into an electron and two neutrinos. Muons are created
in droves when high speed cosmic ray protons from space collide
with nitrogen or oxygen atoms in the atmosphere. Suppose a
muon produced from such a collision is traveling straight down
toward you at 0.994c. What is the lifetime in seconds of the
muon, from your point of view?
a.
0.170 µs
b.
0.241 µs
c.
2.20 µs
d.
20.1 µs
e.
28.4 µs