From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 2/14/2015 11:15 AM, Gerhard wrote:   
   >   
   > Abstract This article describes an isolated optical setup where two   
   > blackbodies - starting at same temperature - will build up a certain   
   > temperature difference. This is done by a simple arrangement with   
   > mirrors which block a different fraction of heat radiation in   
   > dissimilar directions.   
      
   >    
      
   Unfortunately for your scheme, Maxwell's equations in lossless media are   
   time-reversal symmetric, so it isn't possible to violate the second law   
   in this way.  Under time reversal, a ray going one way gets mapped into   
   a ray going the other way, so you can't have one making it and the other   
   not.  The heat transfer is thus entirely symmetrical.  This is true   
   regardless of baffles, mirrors, filtering, polarization, and diffraction   
   tricks.  You've got a bug in your code someplace.   
      
     (It's fortunate for the world, of course, because if something like   
   this were possible there would be no thermodynamic equilibria.)   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
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