XPost: sci.physics, sci.physics.relativity   
   From: nomail@nomail.net   
      
   "Last Timer"  wrote in message   
   news:1105819201.846299.326440@c13g2000cwb.googlegroups.com...   
   >   
   > Uncle Al wrote:   
   >> George Kinley wrote:   
   >> >   
   >> > Hi,   
   >> > If our galaxy is rotating around other group of galaxy under   
   > influenece   
   >> > of combined gravity of galaxies, which mean that combined gravity   
   > of   
   >> > all the galaxy should be more then gravity of individual black hole   
   >> > present in the centre of every galaxy, so how does light travel   
   > under   
   >> > such emmence gravity   
   >>   
   >> 1/r^2   
   >   
   > So you are saying light is made of particles with mass or just a whimsy   
   > that decides to visit a blackhole because the source it came from made   
   > it so?   
      
   Uncle Al is aware of null geodesics whereof the photon's   
   effective potential is given by ( G  =  c  =  1 )   
      
   W_eff  =   [ 1 / r^2 ] [ 1  -  2M /  r ]   
      
   for  r   >>  2M ,    W_eff  =  1 / r^2  (as per Uncle Al)   
      
   Which has the same radial dependence as that of orbital   
   angular momentum. Replacing r with r' such that,   
   r'  =  r / M, the photon's trajectory depends only upon   
   the initial impact parameter.   
      
   [Old Man]   
      
   --- SoupGate-Win32 v1.05   
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