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Black hole entropy is the entropy carried by a black hole.
If black holes carried no entropy, it would be possible to violate the second law of thermodynamics by throwing mass into the black hole. The only way to satisfy the second law is to admit that the black holes have entropy whose increase more than compensates for the decrease of the entropy carried by the object that was swallowed.
Starting from theorems proved by Stephen Hawking, Jacob Bekenstein conjectured that the black hole entropy was proportional to the area of its event horizon divided by the Planck area. Later, Stephen Hawking showed that black holes emit thermal Hawking radiation corresponding to a certain temperature (Hawking temperature). Using the thermodynamic relationship between energy, temperature and entropy, Hawking was able to confirm Bekenstein's conjecture and fix the constant of proportionality at 1/4
The black hole entropy is proportional to its area A. The fact that the black hole entropy is also the maximal entropy that can be squeezed within a fixed volume was the main observation that led to the holographic principle. The subscript BH either stands for "black hole" or "Bekenstein-Hawking".
Although Hawking's calculations gave further thermodynamic evidence for black hole entropy, until 1995 no one was able to make a controlled calculation of black hole entropy based on statistical mechanics, which associates entropy with a large number of microstates. In fact, so called "no hair" theorems appeared to suggest that black holes could have only a single microstate. The situation changed in 1995 when Andrew Strominger and Cumrun Vafa calculated the right Bekenstein-Hawking entropy of a supersymmetric black hole in string theory, using methods based on D-branes. Their calculation was followed by many similar computations of entropy of large classes of other extremal and near-extremal black holes, and the result always agreed with the Bekenstein-Hawking formula.
Nor have you shown the contrary to be any more true. Yet at the same time you would love to use science to prove your case. Your a blatant hypocrite. Ridiculousness abounds on ATS.
I'm quoting you actual evidence.
Show me the evidence that science has shown that matter has an objective existence.
You don't cite any sources just your opinions.
Do you have a clue about black hole thermodynamics?
Again, this is not conjecture and you need more than just your opinion.
Explain Shor's algorithm and quantum computing. Where's the computation taking place?
The weakness of gravity.
What occured before the big bang?
The quantum eraser delayed choice experiment?
The holographic principle and noise found at Fermi Lab.
Quantum entanglement and non locality. Again, this is not conjecture. You just spout off your opinion which is meaningless.
There's zero evidence that matter has an objective existence.
Again, it's very simple to understand. Qubits become entangled and then are expressed as bits in a classical universe because of decoherence.
Decoherence gives you the illusion of being seperated from the whole.
I want you to cite sources that say the way that I've explained decoherence, entanglement and non locality.
I don't want your opinion. Cite sources.
Originally posted by loner007
reply to post by sirnex
I never mentioned it to be as fact but as explaining consciousness in terms of physics this is the only one of merit. Most other models of consciousness fail at some point because classical physics alone cannot lead to consciousness. And since quantum is the underlying framework for classical physics it it not too much of a leap to think consciousness is also at the quantum level.
The last cemi field proposition is that the brain’s (conscious) em field can itself influence neuronal firing. Like the first proposition, this is easy to prove and is indeed inevitable. Radio sets and TV’s are designed to be sensitive to the electromagnetic fields of radio waves; but in fact all electrical phenomena are sensitive to the surrounding em field. Neurones are fired by specific structures, known as voltage-gated ion channels that respond to the external em field. Mostly they are gated in such a way that only massive changes to the brain’s em field are likely to influence neurone firing. However, in a busy brain there will be many neurones teetering on the brink of firing and these undecided neurones may be exquisitely sensitive to the em field. The cemi field – our consciousness - will come into play when the brain is poised to make delicate decisions.
That concept of information encoded as an electromagnetic field is actually a very familiar one. We routinely encode complex images and sounds in em fields that we transmit to our TV and radio sets. What I am proposing is that our brain is both the transmitter and the receiver of its own electromagnetic signals in a feedback loop that generates the conscious em field as a kind of informational sink. This informational transfer, through the cem field, may provide distinct advantages over neuronal computing, in rapidly integrating and processing information distributed in different parts of the brain. It may also provide an additional level of computation that is wave-mechanical, rather than digital; one that drives our free will. This is the advantage that consciousness provides: the capacity to make decisions.
I figured this is what you would do.
Everything that I have talked about is not speculation and there's evidence to support it.
I have cited links but it's obvious you don't have a clue as to what your talking about.
So I'm going to let you rable on until you bring some evidence to the table. This has nothing to do with being open to all possibilities. These things have evidence and I have cited evidence to support everything I have said.
You have yet to show me where science has shown that matter has an objective existence. I have provided evidence that shows matter doesn't have an objective existence.
Nothing I have said doesn't line up with experiments when it comes to these issues.
It's obvious that your trying to debate something that you know nothing about. Maybe you should study these things and then you can debate them in an intelligent way.
I don't mind debate but you are not saying anything. It's just your opinion. You know there's tons of evidence, experiments and peer reviewed papers out there. If you take the time to read these things maybe you can debate them.
You say you are open to all possibilities because you don't understand the issues.
Tell me, what possibilities are you open to? (be specific and cite sources)
What other interpretations are you debating? (be specific and cite sources).
Like I said, I'm open to a good debate but you are just trolling.
A philosophical zombie, p-zombie or p-zed is a hypothetical being that is indistinguishable from a normal human being except that it lacks conscious experience, qualia, or sentience. When a zombie is poked with a sharp object, for example, it does not feel any pain. While it behaves exactly as if it does feel pain (it may say "ouch" and recoil from the stimulus, or tell us that it is in intense pain), it does not actually have the experience of pain as a putative 'normal' person does.
According to objective collapse theories, superpositions are destroyed spontaneously (irrespective of external observation) when some objective physical threshold (of time, mass, temperature, irreversibility, etc.) is reached. Thus, the cat would be expected to have settled into a definite state long before the box is opened. This could loosely be phrased as "the cat observes itself", or "the environment observes the cat".
Objective collapse theories require a modification of standard quantum mechanics to allow superpositions to be destroyed by the process of time evolution.
These experiments demonstrate a puzzling relationship between the act of measurement and the system being measured, although it is clear from experiment that an "observer" consisting of a single electron is sufficient -- the observer need not be a conscious observer.
Originally posted by Hastobemoretolife
reply to post by R-evolve
Well quantum mechanics is actually how the smallest objects in the universe work together so as quantum mechanics actually yield the answers to why things work the way they do along with other new things. Somebody more well versed in the theory behind it could explain it better than I can and even correct me if I'm wrong.
But now that you brought it up though that is what the experiment is though. They actually beam light particles through a certain grid and when looking at what was projected it looks a certain way, but when they try to observe to see why the particles are acting that way the particles act a totally different way.
Pretty freaky stuff really.
Evidence for a theory doesn't make a theory fact, it's still a theory, a speculated possibility until proven absolutely true.
Originally posted by 13579
reply to post by sirnex
Evidence for a theory doesn't make a theory fact, it's still a theory, a speculated possibility until proven absolutely true.
You really do not know what you are saying... Evidence for a theory?
You create a theory based on observation then gather the evidence for it...
Troll like i said
[edit on 8-12-2009 by 13579]