this post was submitted on 13 Jul 2025
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Is there an absolute amount of shelf life to them

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[–] Wrufieotnak@feddit.org 15 points 22 hours ago (1 children)

Nearly correct, but it's not about negative mass, because that doesn't exist as far as I know. Rather it is about matter and antimatter which have other opposite properties, the mass is the same for both. That's why it doesn't matter which particle goes back into the hole, because the creation of the particle pair used up some of the energy (and therefore mass) of the black hole and if both fall back, nothing changes. But if one escapes, a minuscule amount of the mass of the black hole left its event horizon and thereby decreased its mass.

[–] Passerby6497@lemmy.world 2 points 17 hours ago (1 children)

Would it be possible for the antimatter particle to be ejected instead of the 'real' matter particular?

[–] GreyEyedGhost@lemmy.ca 3 points 16 hours ago

Yes, and it doesn't actually matter. The anti-particle will then at some point hit a regular particle of the same type and release energy instead, leaving the universe with more energy which came from the black hole and the destroyed particle.