I think you might be right
I haven't really read much on Hawking Radiation. Does raise an interesting point, though - the complementary spin of a pair of particles is always preserved (or so it is thought), to the point that wherever they end up in the universe, if one is changed then its partner will change to complement that. Which suggests some kind of information might be travelling instantaneously and therefore faster than light.

I think I need to sit down for a bit now...
(LongJohnBaldry, Thu 22 Oct 2009, 13:28, 1 reply, 16 years ago)

Yes
But I think it's not so much that you change the spin of the particle, just measure it. But because the act of measurement then gives the spin a definite value, from that instant the spin of the complementary particle (which as you say, may be on the other side of the universe) is also known. So in that sense it is possible for information to be transmitted* faster than light.

*I say transmitted, but it's arguable whether it's actually possible to do anything with the information other than just know it.

I'm off to sit down too. But only because I've been swimming!
( K2k6 has a proper job these days, Thu 22 Oct 2009, 13:33, Reply)

You're on about quantum entanglement, right?

( jim_bob can herd cats., Thu 22 Oct 2009, 13:41, Reply)

Yup

( K2k6 has a proper job these days, Thu 22 Oct 2009, 13:46, Reply)

I can't be bothered to read all that
but due to the uncertainty principle, particles can leave a black hole. To leave a black hole they must be able to travel faster than light.
The travelling thing is a bit wierd because they don't actually leave they just pop into existance somewhere else but that's a problem with wording.
(PsychoChomp, Thu 22 Oct 2009, 13:43, Reply)

I think
you're making up some of that!
( K2k6 has a proper job these days, Thu 22 Oct 2009, 13:47, Reply)

I'm not
black holes evaporate eventually.
(PsychoChomp, Thu 22 Oct 2009, 13:51, Reply)

Sort of, although
it's not quite that simple.

I need to go and look it up though, as I'm far from expert on quantum physics!
( K2k6 has a proper job these days, Thu 22 Oct 2009, 13:55, Reply)

Not true
They leave a black hole because they're one of a particle antiparticle pair created near the event horizon. Ones goes in and the other goes out so it looks like the black hole is radiating. More so because the one which got away has real energy associated with it whereas the one which fell in has negative energy associated with it. So the net energy change for the black hole is negative.

Nothing to do with things travelling faster that light at all.

(Shippy has a phd in particle physics and hopes he's remembered all that correctly.)
(Shippy likes linebreaks and doesn't care what you think, Thu 22 Oct 2009, 13:55, Reply)

That's more as I remember it
and is a better explanation of what I was trying to say up the page a bit.
( K2k6 has a proper job these days, Thu 22 Oct 2009, 14:09, Reply)