Timeline for Can black holes form in a finite amount of time?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Apr 4, 2019 at 0:36 | comment | added | Felix Tritschler | ... Then, Ben's blue and red equitemporality ("now") lines in Fig.2 and 3 are wrong. Equitemporality lines of outside observers do not cross the event horizon. If need be, I can provide a diagramm with coordinates to make that clear. I am actually surprised that this kind of misinformation appears on physics.stackexchange and doesn't get corrected for years. | |
| Apr 3, 2019 at 23:55 | comment | added | Felix Tritschler | To AccidentalFourierTransform: I have waited quite a long time now, and still Ben's answer appears here as correct, even though it is completely wrong. From his answer and his comments he apparently really thinks (and conveys) that, from an outside observer's perspective, collapsing masses / in-falling observers just appear to slow down to a standstill at the coordinate event horizon, whereas they really do, like e.g. Nathaniel correctly described in his answer to quite the same question here:"how can anything ever fall into a black hole as seen from an outside observer". | |
| Aug 23, 2018 at 21:35 | comment | added | Felix Tritschler | Thank you. As to where this comes from, well, the statements of special and general relativity concern what really is, not just what appears to happen in the reference frame of an observer. Ben wrote "... the main conceptual issue that was confusing the OP, which is that they seemed to have assumed that "seeing" and "being" are the same thing". And he is wrong about that. An in-falling object does not just appear to slow down to us, in our frame of reference, it really does. | |
| Aug 22, 2018 at 22:28 | comment | added | AccidentalFourierTransform | "In our frame of reference, strictly according to GR, no event horizon could ever have formed" Can you elaborate on this, please? I could use some more detail. Where does this come from? Thank you, and welcome to physics.SE! | |
| Aug 22, 2018 at 22:10 | review | Late answers | |||
| Aug 22, 2018 at 22:28 | |||||
| Aug 22, 2018 at 21:55 | review | First posts | |||
| Aug 22, 2018 at 23:08 | |||||
| Aug 22, 2018 at 21:54 | history | answered | Felix Tritschler | CC BY-SA 4.0 |