Hawking radiation Definition and 209 Threads

The theory of "Hawking radiation" says that black holes can emit different particles. We have a particle-antiparticle pair and one of them falls into the black hole while the other one escapes. On the other hand, we know that particles with color charge like quarks or gluons cannot travel...

I've read as much on the subject as I can before getting into the actual math of it, so I need people who know the subject better then I do to answer my question. The way I understand it, at the quantum level, particle/anti-particle pairs are created all the time and annihilate before they...

Actual experimental aparatus, measurements and all that, see figure 2 on page 6 http://arxiv.org/abs/1008.1911 Measurement of stimulated Hawking emission in an analogue system Silke Weinfurtner, Edmund W. Tedford, Matthew C. J. Penrice, William G. Unruh, Gregory A. Lawrence (Submitted on 11 Aug...

I'm not quite sure how reliable http://library.thinkquest.org/C007571/english/advance/core4.htm" as a source but I thought it provided a good derivation for the Hawking Radiation equation relative to the Heisenberg uncertainty principle- First the energy of the radiation is established-...

So, when you plunge into a rotating black hole, according to penrose diagram one could travel to different universes, but at the same time black holes emit particles by hawking radiation. So what happens to an object inside the black hole? Do I make an error in reasoning somewhere?

Can someone give some opinions on the following? The 2 main arguments from this site i can tell are: that hawking radiation isn't proven. And that high energy collisions in the upper atmosphere travel at a fast speed & the small black holes can escape from Earth unlike in the lhc. I...

Does Hawking radiation account for the parity imbalance between matter and anti-matter? Do Black Holes create matter? If a matter/anti-matter pair materializes on either side of the event horizon of a black hole: 1) if the matter particle is on the inside of the event horizon, the mass of the...

1)when hawking first propounded this thermal radiation, he took into acount the the gravitational cllapse. so I am not sure, if we consider a stationary system, then there won't be any particle creation. Is this the case? because I think there will not be any mixing of posive and negative...

With the theory of Hawking Radiation, people generally say to imagine that the black hole has a temperature, so it must radiate heat. But, this really is not how it is said to work. The means by which the black hole evaporates is not that particles are actually coming out of it, or that it is...

Posted this on the Astrophysics page but I think it is more appropriate here... Last night in my calculus class I learned about radioactive decay, a nice example using radium. I was taught that the smaller the mass, the slower the rate of decay (or at least that's what I absorbed, I still...

Last night in my calculus class I learned about radioactive decay, a nice example using radium. I was taught that the smaller the mass, the slower the rate of decay (or at least that's what I absorbed, I still have to go over my notes again. Or does the rate not change, but the time it takes...

I see how it is derived for the BH and in case of Unruh effect. In Unruh effect it is a function of acceleration In case of BH distance to the event horizon plays important role What I can't find, however, how tidal forces should be taken into account. For example, in the universe with DE...

i have long been a skeptic of hawking radiation. i would like to explore my concerns, and see what your reaction is. the concept hinges around the idea of a spontaneous particle pair being created somewhere near the EH of a BH. radiation would occur if one of the particles manages to escape...

Hawking radiation is supposed to emanate from black holes because black holes have a temperature. A black hole has to be about 3 times the solar mass. A black hole with a few times the mass of the sun would have a temperature of only one ten millionth of a degree above absolute zero. This is...

Hawking radiation is standard thermal spectrum, thermal spectrum means it only can emit photon. why Hawking radiation contains other particles?(electron neutrino neutron proton etc)

typical poor science reporting on our national media - this time about HR on msnbc.com: http://www.msnbc.msn.com/id/32781964/ns/technology_and_science-science the article states: "Contrary to popular belief, black holes do not suck up absolutely everything around them. They actually emit a...

if light cannot escape a black hole then how do they emit stuff called hawking radiation.

Some thought experiments and questions. I would much appreciate any comments on whether my analyses below are correct. 1. I am falling feet first into a black hole. An external observer will never see me fall past the event horizon. However, in my frame of reference I will fall past it in...

Q1 - hawking radiation hinges around spontaneous particle pair creation near the EH of a BH. the spontaneous pair can only exist for less than the Planck time. how can either of the particle pair travel a far enough distance in that ridiculously small amount of time to actually cross the EH...

How exactly is the amount of Hawking radiation emitted by a black hole related to it's mass/Schwarzschild radius/etc? Is there a formula relating the two for instance? (I'm trying to calculate the time it would take for one of the LHC black holes that will supposedly destroy the Earth - ad...

I'm trying to understand how Hawking radiation works but, as usual, most explanations are oversimplified so they don't appear to make sense. If I understood correctly, pairs of particles and antiparticles pop into existence everywhere in the universe all the time, and usually annihilate each...

I have a question concerning black holes and hawking radiation. I hope it is an adequate question and I pose it in the right section. Consider a free-falling observer 1 approaching the event horizon of a black hole. Evaluating his proper time, one finds that he crosses the event horizon...

Hey everyone, I'm new here. I'm currently a Grade 12 Student interested in Astrophysics, who has just recently applied to University (in Canada: UBC, UVic, UofT, UWO, Queen's, and York; all for Astrophysics and/or Astronomy, if anyone wants to give me advice on which one to choose, please do...

So we have an object falling into a black hole. By its perspective it falls in real time, and by the perspective of the outside it never reaches the event horison. Now if black holes slowly evaporate due to hawking radiation, if one were to observe the black hole for countless billions of years...

I am just an undergraduate student of physics and I would like to know what would be the best (most pedagogical) introduction to Hawking Radiation.

My understanding is that Hawking's radiation is a theory used to explain how black hole's conserve energy. For example, we think black holes grow in size as they consume matter. Any particle that enters the Schwarzschild radius (SR) of a black hole is absorbed. QM purposes that virtual...

http://arxiv.org/abs/0803.1987 Is dark energy from cosmic Hawking radiation? Authors: Jae-Weon Lee, Hyeong-Chan Kim, Jungjai Lee (Submitted on 13 Mar 2008) We suggest that dark energy is the Hawking radiation from a cosmic horizon. Despite of the extremely low Hawking temperature this dark...

What if there is no hawking radiation i.e if it is not proved..i think it is not yet proved...so will it have any influence on information loss paradox..if there is no hawking radiation then the information would be inside black hole and not accessible..so there is no information loss paradox if...

1. Do we have observational proof for hawking radiation? Or is it verified only theoritically? 2. why is that only negative energy photon goes into black hole and positive energy photon is going out from black hole? what if the reverse happens? do we have an observatinal proof for this? 3. can...

As I understand it, a black hole is supposed to evaporate through Hawking radiation after a long but finite amount of time. Also, the radiation encodes in some sense the information of the matter that fell into the black hole. This according to an observer ("Alice") outside the event horizon...

How can you find out the amount of hawking radiation a black hole exhibits? Rube cuber, Merry Christmas

i am trying to understand hawking radiation. in wikipedia, it states: "In order to preserve total energy, the particle which fell into the black hole must have had a negative energy (with respect to an observer far away from the black hole). By this process the black hole loses mass, and to...

Something I've been wondering for a while, but haven't been convinced by the answers I've received. If an astronaut falls into a black hole, from the perspective of us outside he never actually reaches the horizon. From his perspective, he falls straight through and doesn't notice any...

I've been trying to discover a qualitative description of Hawking Radiation and Black Hole evaporation and haven't been able to find one yet. I figured this board might offer some insight. Can someone explain to me how a 'virtual' pair differs from a 'real' pair? It seems to me that no...

Abstract. Theory of quantum gravity is still a mystery, as well as the derivation of fine structure constant and masses of elementary particles. (Fine structure constant is calculated from force between two elementary charges.) Possibility that elementary particles are black holes is offering...

If black hole is so powerful, why doesn't it suck in Hawking radiation as well. I mean, it is just an electromagnetic radiation like light, right?

When a black hole evaporates it gives off Hawking Radiation. Where does the Hawking Radiation? Is it recycled into dark matter or new stars or what? Since mass and energy cannot be destroyed, it goes somewhere in the universe, correct?

I'm having trouble understanding why it is necessary for there to be a particle antiparticle pair formation in order for the black hole to evaporate. According to my understanding of the theory, a particle anti particle pair are formed, and rather than colliding within a given period of time...

I was thinking you know hawking radiation where a virtual particle can escape, is it specific as to which particle can escape as in the particle or it's anti particle? does that make a black hole like a particle 'producing' machine, can these escaped particles be a significant fraction of the...

I have the following article for explanation of Hawking - Unruh radiation: http://arxiv.org/PS_cache/quant-ph/pdf/0401/0401170.pdf . It is the most simple explanation of Hawking radiation until now. Peoples try to find microscopic explanation of this, but, thermal properties of matter are...

According Hawking radiation theory the black holes eventually will evaporate. This process gives energy. The process of black hole creation also gives energy. The accelerating particles emit x-rays while falling into a black hole. Now we can construct perpetuum mobile. We create a black hole...

I hear this is a result of quantum tunneling, what I am wondering is, can one solve the shrodinger equation for black holes under the idea that it is just a really really really deep finite well?

I was thinking, when virtual particles come into exsistance and then one particle go into a black hole and the other gets emmited as hawking radiation and so the particles are no longer virtual and become "real" particles. Does this violate the laws of thermodynamics, and so is the mass/energy...

I am currently taking Advanced Physics Topics class and am doing a research project on Hawking Radiation I was wondering if anyone knew of a free source I cold use that could explain the math behind the radiation a little better. I have looked on a few websites for information and have found...

Could someone explain to me, in excrusiating detail, Hawking Radiation, to include Hawking math and steps leading to the formation of the equations used to define and descibe it. It would be much appreciated. THANK YOU!

In cosmology Hawking radiation, is often quoted as a way Black Holes evaporate. http://en.wikipedia.org/wiki/Hawking_radiation AFAIK there is no way this can be tested other than getting up close to a BH, so is HR accepted in the quantum phys world, as a good model?

I don't know a lot about this topic so corrections are solicited. My understanding is that black holes evaporate by Hawking radiation. Hawking radiation, by my reading, occurs when a pair of virtual particles emerges very close to but just outside the event horizon of the black hole. When...

In reviewing explanations on evaporating Black Holes using Hawking Radiation, based on how the black hole might treat Quantum “Vacuum particle pairs”. Although direct observation of Black Hole radiation has not been confirmed it implied that “Antiparticle – Particle creation, and self...

Let's say you decide to walk backwards into a black hole. Everything looks normal at first but as you get close everything is speeding up. When you're really close everything is going extremely fast. As you cross the event horizon, infinite time passes. (I know saying "infinite time passes" is a...

Please correct my question if I am again misguided. Theoretically not even light is able to escape the gravity of a black hole. Due to the curvature of space the black hole prevents anything or any information from coming back through the event horizon. However Blackholes are supposed to...