- #1
jianxu
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Homework Statement
It seems this question is a little too easy? I'm a little skeptical so could someone please do a quick check for me?
The pion is an elementary particle that decays with a mean lifetime in its rest frame of 2.6x10^-8s. A beam of pions has a speed of 0.79c.
a) In the frame of the pion, how far does the lab travel in one mean lifetime.
b) what is the distance in the lab's frame
Homework Equations
distance = speed * time
The Attempt at a Solution
so for part a, I simply multiplied the speed and the time to determine how far the pion travels and then simply use that as the distance.
for part b, the answer simply has to be zero because in the lab's frame, the lab doesn't move but the pion moves. I assume I can prove this through galilean transformations as well.
These answers seem too simple for some reason and just want to make sure these answers are correct. Thanks! =D