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| Thread ID: 47781 | 2004-08-05 11:17:00 | OT- Hawking black hole radiation | TonyF (246) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 258521 | 2004-08-05 11:17:00 | Much in the news. For those interested, go to math.ucr.edu Heavy stuff, but fascinating..( a bit beyond dairy arithmetic...) |
TonyF (246) | ||
| 258522 | 2004-08-05 11:57:00 | Quite a lot of "non-trivial" stuff involved :) "If you jump into a black hole, your mass-energy will be returned to our universe, but in a mangled form, which contains the information about what you were like, but in an unrecognisable state." A somewhat terse description of educational assignments, personalised" R2 |
R2x1 (4628) | ||
| 258523 | 2004-08-05 12:07:00 | Did you come out mangled, but at a much higher level ?? Cheers T |
TonyF (246) | ||
| 258524 | 2004-08-05 12:10:00 | Event Horizon is one of the better movies ever made. | metla (154) | ||
| 258525 | 2004-08-05 12:15:00 | Considerably mangled, but at a very much lower level. And if black holes decay, where do they get fresh vacuum to replace that which was displaced when the black hole was formed in the first place? For, not only does nature abhor it, didn't Ford Prefect postulate "that vaccum can neither be formed nor destroyed, but merely used as inter-cranial filler in the student body". I suspect that sub-standard vacuum is used to make politicians. R2 |
R2x1 (4628) | ||
| 258526 | 2004-08-05 14:08:00 | > I suspect that sub-standard vacuum is used to make > politicians. > R2 You need suspect no more R2, your right on the money. It takes 20 car sharks and a ships rat to make a politician tick, 2 rats for senior caucus members, 5 for leaders and 10 for aspiring (con-spiring) leaders. Cheers Murray P |
Murray P (44) | ||
| 258527 | 2004-08-06 02:41:00 | > > And if black holes decay, where do they get fresh > vacuum to replace that which was displaced I'd suggest Noel Leeming, Smiths City or Harvey Norman. Personally I prefer a Nilfisk. :D |
Winston001 (3612) | ||
| 258528 | 2004-08-06 06:57:00 | > And if black holes decay, where do they get fresh > vacuum to replace that which was displaced when the > black hole was formed in the first place? Black holes are formed by the intense gravitational field created by the collapse of a dead star under the force of its own gravity, and do not displace the vacuum of space. In simple terms, a vacuum is the absence of air and logically you cannot displace something that isn't there to start with. The sum increase in knowledge from Stephen Hawkings latest prognostication is that we now know that if you fall into a black hole, your immortal remains will leak out over a millennia or two and eventually mess up somebody's space boots. This is bit like the difference between being pile-driven 20 metres into soft earth, or being propelled with equivalent force against a solid and immovable object. With the former, people wonder where you suddenly disappeared to, but eventually forget you existed, and with the latter they can see exactly where you went, and wish they could dispense with the reminder. Cheers Billy 8-{) :| |
Billy T (70) | ||
| 258529 | 2004-08-07 09:39:00 | As always, a colourful and dramatic metaphor from Billy. The issue was, for Hawking, Thorne and Preskill, whether Hawking Radiation (the "Black Holes Have Hair" theory) returned matter swallowed by a black hole back to the Universe eventually, or whether it disappeared from this Universe when the black hole evaporated. Whew! So Hawking now accepts (sort of) that Preskill is right. Ergo, black holes do not lead to other universes and the matter (information) in the form of photons comes back out to us in the long run. Simple really. I'm just off to have a wee lie down. :D |
Winston001 (3612) | ||
| 258530 | 2004-08-07 09:42:00 | > . . . collapse of a dead star under the force of its own gravity, and do not > displace the vacuum of space . In simple terms, a vacuum is the absence of air > and logically you cannot displace something that isn't there to start with . Sorry Billy T, I was referring to the astronomical black holes, not MicroSoft R2 |
R2x1 (4628) | ||
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