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Dec 10, 2020 at 14:43 history edited Ash CC BY-SA 4.0
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Dec 10, 2020 at 12:02 history edited Ash CC BY-SA 4.0
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Dec 10, 2020 at 9:46 comment added AlexP Antimatter does not have negative mass. As far as we know, nothing has negative mass.
Dec 10, 2020 at 9:22 comment added Dast I really like this answer, however the claim that having mass of "-1" is equivalent to anti-matter is contrary to current 2020 physics. Anti-particles have the opposite charge to their partner particle, and all sorts of other opposite traits. But they have the same mass, positive in all cases. Its controversial whether you can get negative mass, but if you can it will be some strange Casimir effect thing probably, not anit-matter.
Dec 10, 2020 at 5:36 history answered Ash CC BY-SA 4.0