Why Nostr? What is Njump?
2024-11-24 17:52:45
in reply to

TobyBartels on Nostr: nprofile1q…ze5g0 nprofile1q…cyu7x nprofile1q…ufa4k nprofile1q…lj7pr : If the ...

: If the particles are moving at exactly lightspeed, at exactly the event horizon, then Bob will see Alice hitting them exactly when Bob sees himself hitting them, but that's normal; every time Bob looks at Alice, he sees her hit a photon exactly (and I mean *exactly*) when he sees that photon hit his retina.

If the particles are moving slightly below lightspeed, accelerating slightly to maintain their distance slightly outside the event horizon, then Bob will see Alice hitting slightly different particles than he hits. Even though Alice jumped out well ahead of him, he sees her hit almost the same particles as he does, because those particles are moving so fast; the particles that she hit almost reach him before he hits slightly different ones.

For this reason, I think that it's fair to say that the event horizon is approaching Bob. But that's from Bob's perspective; you could also say that he's falling towards it.
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