Wednesday 27 December 2017

special relativity - Symmetric Time Dilation in Uniform Relative Motion


I feel (and hope) this is an easily answerable question among physicists versed in GR. I promise that I searched for other answers on the forum. Here goes:


Observer 1 starts at X distance from observer 2, moves at 99% the speed of light towards observer 2 and then stops to interact with observer 2.


My questions are:




  1. Since each observer sees the other as moving slower/faster due to the interchangeability of reference frames, do the slower/faster speeds cancel one another out?





  2. If so, does time dilation really matter for observers?






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