An observer in a rocket moves toward a mirror at speed v = 0.65c relative to a stationary frame S, see figure below. The mirror is stationary in S. A light pulse emitted by the rocket travels to the mirror and is reflected back to the rocket. The rocket is a distance d = 5 c'months, as measured in S, from the mirror when the light pulse is emitted. What is the total travel time of the pulse as measured by observers in (a) the S frame and (b) the front of the rocket? Use LT events approach.

An observer in a rocket moves toward a mirror at speed v = 0.65c relative to a stationary frame S, see figure below. The mirror is stationary in S. A light pulse emitted by the rocket travels to the mirror and is reflected back to the rocket. The rocket is a distance d = 5 c'months, as measured in S, from the mirror when the light pulse is emitted. What is the total travel time of the pulse as measured by observers in (a) the S frame and (b) the front of the rocket? Use LT events approach.