An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.976c. Relative to a stationary reference frame fixed to the laboratory, the particle travels a distance of 1.21 10-3 m before disintegrating.
(a) What is the proper distance traveled?
(b) What is the distance measured by a hypothetical person traveling with the particle?
(c) Determine the particle's the proper lifetime.
(d) Determine the particle's dilated lifetime.