- #1
radiator0505
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Homework Statement
I've been going over past papers recently and I can't see how to start this one, I get confused with the reference frames and it looks like I don't have enough information to start this.
"An unspecified meson has a mean lifetime , defined in its rest frame, of t = 2.60x10^-8. The meson decays into a muon and a neutrino. At what speed does the meson have to be moving for it to travel a distance of 20m in the lab frame?"
Homework Equations
T=γt
L=l/λ
v=s/t (not sure about this one, would i need to use the relativistic velocity?)
The Attempt at a Solution
I can't see how to start, if I could figure out gamma or either of τ and l I think I can do it.