From: nicolaas.vroom@pandora.be   
      
   On Sunday, 7 July 2019 10:04:06 UTC+2, PengKuan Em  wrote:   
   > Le samedi 6 juillet 2019 00:48:33 UTC+2, Nicolaas Vroom a écrit :   
   > > You can only perform the experiment in a slightly different ways.   
   > > Construct two identical trains and put both side by side on a long   
   > > track. The observer is a far distance away from the center of the   
   > > trains. From that position the observer (video camera) can only see one   
   > > train. At the beginning of the experiment you bring the train closest to   
   > > you to the far left and the experiment starts when this train moves   
   > > towards the right at high speed. The question is now when the moving   
   > > train is in between the train at rest and the observer will the observer   
   > > see (part of) the train at rest? When the answer is yes, there is length   
   > > contraction involved.   
   > >   
   > If I have well understood, your experiment is equivalent to the Ladder   
   > paradox, which is explained here:   
   > https://en.wikipedia.org/wiki/Ladder_paradox   
      
   My experiment is simpler as the Ladder paradox. In the Ladder paradox   
   assumes IMO that there is length contraction involved and that this   
   leads to a paradox. The Ladder paradox involves relativity of   
   simultaneity which makes it rather complex. The experiment I have in   
   mind should be as simple as possible (in theory). The purpose is only to   
   answer the question: is there (physical) length contraction involved:   
   yes or no. (Not how much) The most important tool you need is a very   
   fast video camera to observe what happens.   
      
   Nicolaas Vroom.   
      
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