At rest,pions have a proper lifetime of 26 ns.What is the speed of a beam of pions if their observed lifetime were measured to be 64 ns ? (This is a real experiment that has been performed and found to be consistent with Special Relativity.)
A)0.96c
B)0.84c
C)0.70c
D)0.41c
E)0.91c

Question

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The Answer of At rest,pions have a proper lifetime of 26 ns.What is the speed of a beam of pions if their observed lifetime were measured to be 64 ns ? (This is a real experiment that has been performed and found to be consistent with Special Relativity.)
A)0.96c
B)0.84c
C)0.70c
D)0.41c
E)0.91c

At Rest,pions Have a Proper Lifetime of 26 Ns