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That confuses me because it sounds a lot like Zeno's Paradox. If nothing ever falls inside how are we observing the effects of black holes which have mass? The
by hnick 7y ago
That confuses me because it sounds a lot like Zeno's Paradox. If nothing ever falls inside how are we observing the effects of black holes which have mass? The mass must have fallen in at some point so it can't have taken forever.
I know this stuff is confusing but an explanation would be great :)
- adrianN 7y agoCan we actually distinguish black holes with a singularity in the middle from more mundane extremely dense objects, e.g. quark degenerate matter?
- hnick 7y agoDo you mean empirically? I think so, based on gravitational lensing effects and not allowing light through directly. A lesser object won't have an event horizon. But I'm hardly an expert.
- l33tman 7y agoIf you mean two objects where the first has a singularity and the second "just" an equivalently heavy matter-object, strictly speaking in classical GR (as the only agreed-on current theory) the latter will invariably collapse into the former so the answer is no. But on the other hand, I don't think any modern particle physicist actually believes there is a singularity as its a purely classical construct. This is why there is so much research into black hole information processing in the first place.