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Revision as of 14:43, 28 March 2017 by Mahjongg (talk | contribs) (sufficient energy? How?)
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question... What do you mean by a photon striking with sufficient energy? A photon has a constant mass, and (light) speed, so how can the impact energy differ? Mahjongg (talk) 15:42, 28 March 2017 (CEST)