From: tjroberts137@sbcglobal.net   
      
   On 6/29/19 1:41 PM, PengKuan Em wrote:   
   > What is sure in my paper is that no direct measurement of length   
   > contraction has been done.   
      
   Yes. There are, of course, good reasons for this -- with current   
   technology it simply is not possible to test "length contraction"   
   directly (in the sense of measuring a length in two frames and comparing   
   to the SR prediction).   
      
   > This is what I'm trying to propose.   
      
   Sure. But you must not only have a physical situation that demonstrates   
   "length contraction", you must also have instrumentation that can   
   distinguish between no contraction and the SR prediction, hopefully   
   by more than five sigma, but certainly by at least three sigma. As I   
   said before, at present no such instrumentation exists, for any   
   implementable physical situation.   
      
   Tom Roberts   
      
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