Hi Is this analysis right A space ship is travelling at a steady speed V in the direction shown. Inside the space ship is a simple clock of length L and consisting of a light source at “a” and a mirror at “b”. The light leaves “a”, bounces off the mirror at “b” and goes back to “a”, which counts as a single tick of the clock. As the space ship is moving the clock is shown at times t1, t2, and t3. At time t2 the clock which was originally at a and b will now be at a' and b'. Time t2 is the time the light reaches the mirror. The mathematical analysis for the time taken for one tick to occur is T = ((L – vt)/c) + ((L + vt)/c) (L – vt)/c = is the time taken for the light to leave the light source and travel to the mirror. (L + vt)/c = the time to do the return trip. vt = the distance travelled by the clock in the time it takes for the light to travel the length of the clock. do I have to allow for length contraction? Is the above correct?