Hawking Radiation

[bellydancerocks321]

This looks interesting, but where is the sound?

[darthspeaks]

Those who gave this 3 stars don't know enough to judge on it anyways...

[3dbeing]

what software did you use for this animation?

[guysoft42]

Blender.

I think it was 2.4.2 at the time.

[guysoft42]

Basicly, vacuum isn't nothing. And inside it is constant formation of particle pairs of matter and anti-matter. The idea that hawking gave is that at the surface of the blackhole, such pairs will appear. And it can be possible for the anti-matter particle to fall in the black hole, and for the particle to get thrown out (that's what you see in this animation).

__continue in next post__

[jimim22]

cheers!

so the pairs form, and im guessing that there are an equal number of antiparticles being thrown out as well as normal particles, but they get annihilated so we dont detect them? is that right?

and why is it that this is always thermal radiation and not light for example?

[guysoft42]

Well, I am not totally sure. But I do know, photons have no electrical charge. Anti-particles is talking about charge only.

There is on thing as an "anti-photon". So you can't have a pair.

[jimim22]

?

what does the animation mean then? surely radiation will be in the form of photons, and the diagram seems to show a paair of photons?

lol...:S

im trying to contact someone at southampton uni about this!

[guysoft42]

The p was for Particle, thats what usually I saw in the 2D diagrams. Its not a photon :-) .

Also, I think one of the equation I came across was talking about probability according to mass. And photons, don't seem to have that.

[LeiMagnus]

P is perhaps pRoton?

Protons have antiparticle equivilents. But my understanding of Hawking radiation is that they are not particle-antiparticle pairs, but positive-mass-negative-mass pairs. The negative mass partical falls into the black hole, thus decreasing its mass. But why it is always the positive-mass particle that escapes is a mystery that still eludes me o.O

[impiccolomofo]

@LeiMagnus What are you talking about? There are Antiprotons made of the opposite number of quarks. And the reason the positive mass particle escapes is this: when a pair of particles appears near a black hole, and one of them gets sucked in, the other one cannot annihilate, and becomes real instead of virtual. Since energy is not created or destroyed, the other one has to have negative mass, to make up for the "creation" of the one that escaped. The energy level remains constant.

[Hobbzie02]

@impiccolomofo why can't the emmited radiation be negative? That would make the other particle positive.

[impiccolomofo]

@Hobbzie02 There's a difference between a positively charged particle and and positive mass particle. Positive and negative charges are about electrical charge, not mass. It doesn't matter which particle it sucks in, whatever the charge is, the other one cannot annihilate and becomes real. You cant create matter, so mass MUST be taken from the black hole to equal the amount of matter that was just "created". Whatever particle escapes has positive mass. The charge can be pos OR neg. Clear it up?

[cyperium]

The - and + are negative and positive mass, when negative mass enters the black hole the mass of the black hole decreases. The + has just about the right amount of energy to leave the black hole as radiation.

[ANGOOSE720]

@guysoft42 thats incorrect anti-particles is not talking about charge only, anti particles just have the opposite of all the fundamental numbers like charge, spin, color charge, ect. The photon is it own anti-particle because it dose n't travel in time. Its hard to explain so if you want to know more find out for your self.

[guysoft42]

Sure you can ask :-)

First, you better understand that their are two branches of physics that are used in this mess. "general relativity" and "quantum mechanics". According to general relativity, nothing can escape a black hole, not even light, and space-time. However, the is a proven pronominal in quantum physics that is called "virtual partial formation". _continue in next post_

[bader58]

yes..this makes sense

[guysoft42]

Virtual particles do exist. Makes a lot of sense when you try and figure out the strong force in an atom.

Basicly the vacuum is not that empty after all...

This radiation is wily accepted in science, and stuff coming out of nothing is something that we see in labs all the time.

[jimim22]

i'm doing a physics investigation with a section on hawking radiation, u reckon i could ask a few questions about it?

if light can't escape from a black hole, how can other radiation? i heard it was to do with angles of attack and how the blakc hole spins?

also, what happens to photons inside the black hole and how is hawking radiation actually formed?

and why is it that the power emission of hawking radiation is inversely prop to mass squared?