ions have a half life of 1.8*10exp(-8)sec. A pion beam leaves an accelerator at a speed of 0.8c, What is the expect distance over which half the pion should decay:

Question

(a) classically
(b) relativistically

Answer 1

(a) V*T
where T is the half life and V = 0.8c

(b) V*T'
where T' = T/sqrt[1 - (v/c)^2]= (5/3)T
is the relativistically extended half-lite.

Please refer to the subject as physics, not physic. In English, a physic is a medication.