Mass of a system of two photons

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    Mass Photons System
  • #51
MeJennifer said:
Note that energy and momentum are not Lorentz invariant properties, instead they are covariant.
Yay for MJ. :smile:

Not too many people know of that use of the term "covariant." Bravo to MJ :smile:

Pete
 
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  • #52
rbj said:
reading this is refreshing (to me, at least).
Me too.

Pete
 
  • #53
MeJennifer said:
Note that energy and momentum are not Lorentz invariant properties, instead they are covariant.

Has anyone ever claimed anything contrary to that?
 

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