The mirror is stationary with respect to S. A light pulse emitted by the rocket travels
toward the mirror and is reflected back to the rocket. The front of the rocket is a distance
1.88 × 10 ^12 m from the mirror (as measured by observers in S) at the moment the light
pulse leaves the rocket.
What is the total travel time of the pulse as measured by observers in the front of the rocket?
Answer in units of s. Note: the answer is not 9722 seconds
The 354 word solution, complete with diagram answers the questions.