From: nedlatham@internode.on.net   
      
   Ned Latham wrote:   
   >   
   > Has anyone ever tested for, or better yet measured, doppler shift   
   > in light traversing a refractive substance such as glass?   
      
   I need to rephrase this question:   
      
   Has anyone ever measured any change in either frequency or wavelength   
   in a beam of light between its traversal of a material of refractive   
   index <= 1 and its further traversal of another material, one of   
   refractive index > 1?   
      
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