An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.950c.Relative to a stationary reference frame fixed to the laboratory, the particle travels a distance of 1.34*10-3 m before disintegrating.
a) What is the proper distance travelled?
b) What is the distance measured with a hypothetical person travelling with the particle?
c) What is the proper lifetime?
d) What is the dilated lifetime?