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   sci.physics.research      Current physics research. (Moderated)      17,516 messages   

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   Message 16,584 of 17,516   
   Tom Roberts to Nicolaas Vroom   
   Re: How to test length contraction by ex   
   13 Jul 19 17:53:25   
   
   From: tjroberts137@sbcglobal.net   
      
   On 7/12/19 5:11 PM, Nicolaas Vroom wrote:   
   > [...] The final step is to perform this experiment with two rods,   
   > with the same length at rest.   
      
   This experiment will fail, for the same reason as before: you cannot   
   make the ends of the rods flat to the accuracy required to observe the   
   "length contraction" of the moving rod.   
      
   > The physical issue if the moving rod (or train) becomes shorter   
      
   But SR predicts that the moving rod (or train) does NOT "become   
   shorter". It also predicts the moving rod WILL BE OBSERVED to "look"   
   shorter. While this does not negate your proposed experiment, your   
   repeated use of this incorrect phrase does indicate a fundamental   
   misunderstanding on your part.   
      
   Tom Roberts   
      
   [[Mod. note -- Note that in the final paragraph above, the author is   
   using "will be observed" in the technical sense of special relativity,   
   i.e., this refers to observations made by a CO-LOCATED observer so that   
   there are no speed-of-light propagation delays.]]   
   -- jt]]   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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