- #1
alicia.kostka
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Homework Statement
How fast must a pion be moving on average to travel 25 meters before it decays? The average lifetime, at rest, is 2.6 x 10-8s.
Homework Equations
[tex]\Delta[/tex]t =[tex]\Delta[/tex]t0/ sqrt(1 - v2/ c2)
l = l0 * sqrt (1 - v2/ c2)
The Attempt at a Solution
I think that 2.6 x 10-8 is the proper time right? And then is 25 meters the length or the proper length? I'm totally lost... I honestly don't know where to go first. I know that I have to find the lifetime of the pion relative to an resting observer...