From: titang78@gmail.com   
      
   Le jeudi 20 juin 2019 19:07:17 UTC+2, Sylvia Else a écrit :   
   > So now you have to synchronise spatially separated clocks, and to do   
   > that you have to must assumptions about space time. The obvious   
   > assumption is that special relativity is correct, and that you can use a   
   > method that synchronises clocks in special relativity.   
   >   
   > But now you are no longer just testing length contraction. Instead, you   
   > are looking at whether the entire experimental situation gives results   
   > that are consistent with relativity.   
   >   
   > Sylvia.   
      
   We have to make sure that in the experiment time respect SR, then we   
   measure the length.   
      
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