- #1
AishaGirl
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The 4-momenta before a photon collides with a stationary election [itex]P_m=(mc^2,0,0,0)[/itex] or is it [itex]P_m=(mc,0,0,0)[/itex]
Which is the difference between the two?
Thanks.
Which is the difference between the two?
Thanks.
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