From: nicolaas.vroom@pandora.be   
      
   On Monday, 9 October 2017 08:52:29 UTC+2, lbjohn...@yahoo.com  wrote:   
   > > On 10/1/17 10/1/17   12:07 PM, Nicolaas Vroom wrote:   
   > >The question is have these effects any physical consequences.   
   > >The answer is yes when you consider these effects in gravitational   
   > >context. The reason are the gravitons (the speed of the gravitons)   
   > >which (influence) originate from their retarded positions as 'observed'   
   > >now. With 'observe' I mean: felt, influenced   
   >   
   > When you decide to use a field method then you must specify where   
   > in the field the boson originates. When you do that you'll see there   
   > is no paradox as the graviton must originate at the leading edge   
   > of the field.   
      
   I do not think the discussion is about a paradox.   
   The issue is about is the question: is length contraction something   
   physical.  The reply of Phillip is (if I'm allowed) No. it is an   
   illusion.   
   I agree with him.   
   The reply Tom is: There are certain cases where you can invoke   
   "length contraction" to explain certain physical phenomena.   
   I agree with him in the case of the moving train experiment.   
   In that case the observed length contraction is a visible illusion   
   but it can still have physical consequences.   
   Consider the Sun and a (fast moving) comet. The shape of the comet is not   
   round but has the shape of a rocket. The direction of the rocket is in   
   the direction of the path of the comet i.e. rocket.   
   In that situation length contraction has physical consequences when you   
   assume that, using Newtonian mechanics, gravity does not act instantaneous.   
   In GR I assume this is the same.   
      
   Nicolaas Vroom.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)