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victorhugo
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I always hear that the two 'don't match' and disagree, but never in what...
Someone mind explaining?
Someone mind explaining?
Are you talking about special relativity or general relativity.victorhugo said:I always hear that the two 'don't match' and disagree, but never in what...
Someone mind explaining?
victorhugo said:I always hear that the two 'don't match' and disagree, but never in what...
Someone mind explaining?
Dale said:Are you talking about special relativity or general relativity.
You didn't exactly answer my question asking for clarification, but if you are indeed asking about special relativity then there is NO conflict between special relativity and quantum mechanics. The conflict that there used to be was resolved about 90 years ago.victorhugo said:taking into account special relativity
victorhugo said:Something just popped into my mind: what is the formula for the de Broglie wavelength taking into account special relativity mass/time/length dilations?
Yes sorry, I forgot to address your question. I just meant whatever relativity people mean when they say it conflicts with quantum mechanics. It appears that it is General Relativity then!Dale said:You didn't exactly answer my question asking for clarification, but if you are indeed asking about special relativity then there is NO conflict between special relativity and quantum mechanics. The conflict that there used to be was resolved about 90 years ago.
Ok, I have edited your title and deleted some irrelevant posts.victorhugo said:Yes sorry, I forgot to address your question. I just meant whatever relativity people mean when they say it conflicts with quantum mechanics. It appears that it is General Relativity then!
ProfChuck said:In the case of a black hole the classical model assumes that the preponderance of the mass of the structure lies within the event horizon.
ProfChuck said:Quantum gravity, however, assumes that the observable mass of a black hole is dependent on the exchange of particles. It is not clear how this can occur without jeopardizing causality because these particles must cross the event horizon
PeterDonis said:It's even more extreme than that. The classical (GR) model says (not "assumes"--it's derived from the Einstein Field Equation) that the black hole is vacuum inside. The mass that originally collapsed to form the hole reaches the singularity and disappears. But this conclusion does not play well with QM, because it violates unitarity.
This is not a problem for two reasons:
(1) Virtual particle exchange is not limited by the mass shell condition (heuristically, virtual particles have a nonzero amplitude to travel faster than light).
(2) The gravity you feel when you're outside a black hole doesn't come from inside the hole; it comes from the matter that originally collapsed to form the hole, while it was still outside the horizon. In other words, it comes from the stress-energy in your past light cone.
See here for more discussion:
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_gravity.html
ProfChuck said:There are testable predictions from general relativity that describe the behavior of black holes so where the domains of classical and quantum physics overlap the two models should produce identical or at least similar results.
ProfChuck said:Google "The Ivie conundrum"
It is important for these two theories to agree because they both aim to explain different aspects of the physical world. General relativity explains the behavior of large-scale objects, such as planets and galaxies, while quantum physics explains the behavior of subatomic particles. In order to have a complete understanding of the universe, these two theories must align and be able to accurately describe all phenomena.
The main differences between these two theories are their scope and the scales at which they operate. General relativity is a classical theory and deals with the macroscopic world, while quantum physics is a modern theory and deals with the microscopic world. Additionally, general relativity describes gravity as a curvature of spacetime, while quantum physics describes the behavior of particles and their interactions.
The biggest challenge in reconciling these two theories is that they are based on fundamentally different principles. General relativity is based on the concept of continuous spacetime, while quantum physics is based on discrete particles. This creates a conflict when trying to apply both theories to the same phenomena, such as the behavior of black holes.
There are several proposed solutions, but none have yet been fully accepted by the scientific community. Some theories, like string theory and loop quantum gravity, attempt to merge the two theories into a single framework. Other theories, like the holographic principle, suggest that one theory may be more fundamental and the other could be derived from it.
It is currently unknown if there will ever be a single unified theory that combines general relativity and quantum physics. While many scientists continue to work towards this goal, it is possible that the two theories may remain separate and only applicable to certain scales or phenomena. However, advancements in technology and further research may eventually lead to a better understanding and potential unification of these two fundamental theories.