1. Oct 24, 2011 #1

   jayaramas

   

   do all mass less particles travel at the speed of light?

    

   jayaramas, Oct 24, 2011
2. 
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3. Oct 24, 2011 #2

   Doc Al

   

   Staff: Mentor

   Yes.

    

   Doc Al, Oct 24, 2011
4. Oct 24, 2011 #3

   Phrak

   

   Why?

    

   Phrak, Oct 24, 2011
5. Oct 24, 2011 #4

   Naty1

   

   PHRAK.....Stop teasing Doc Al!!
   
   Best answer I know: that's what we observe.

    

   Naty1, Oct 24, 2011
6. Oct 26, 2011 #5

   Phrak

   

   But I was just getting started...
   
   First we have "particles" and they're "moving", and this is supposed to be physics 200 years after Newton.

    

   Phrak, Oct 26, 2011

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