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matt_crouch
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Calculating the "proper mean lifetime" of pions
The mean lifetime of pions at rest is to=2.6x10^-8. if a beam of pions has a speed v=0.85c
a)what would their lifetime be in the laboratory?
b)how far would they travel before they decay?
c)what would your answer to b) if you neglect time dilation
d)what would the "proper mean lifetime" be?
i think done a-c right but don't really know how to do d)
my answers
a)4.94x10^-8
b)12.5 m
c)6.63m
im not sure how to calculate the proper mean lifetime can anyone help?
Homework Statement
The mean lifetime of pions at rest is to=2.6x10^-8. if a beam of pions has a speed v=0.85c
a)what would their lifetime be in the laboratory?
b)how far would they travel before they decay?
c)what would your answer to b) if you neglect time dilation
d)what would the "proper mean lifetime" be?
Homework Equations
The Attempt at a Solution
i think done a-c right but don't really know how to do d)
my answers
a)4.94x10^-8
b)12.5 m
c)6.63m
im not sure how to calculate the proper mean lifetime can anyone help?