27
edits
Changes
Talk:Counterexamples to Relativity (view source)
Revision as of 20:49, April 4, 2010
, 20:49, April 4, 2010→Several Clarification/Corrections
:::::Not "technically it is false," but "it is false." So teach it that way.--[[User:Aschlafly|Andy Schlafly]] 03:02, 31 March 2010 (EDT)
:::::Not "technically it is false," but "it is false." So teach it that way.--[[User:Aschlafly|Andy Schlafly]] 03:02, 31 March 2010 (EDT)
::::::See KrisJ's discussion below. [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
::3. 8 is not a problem because quantum nonlocality doesn't allow for information transfer. Hence special relativity is not violated.
::3. 8 is not a problem because quantum nonlocality doesn't allow for information transfer. Hence special relativity is not violated.
:::::Special relativity does not define "information" nor was it developed in that context.--[[User:Aschlafly|Andy Schlafly]] 03:02, 31 March 2010 (EDT)
:::::Special relativity does not define "information" nor was it developed in that context.--[[User:Aschlafly|Andy Schlafly]] 03:02, 31 March 2010 (EDT)
::::::It is true that SR does not define information, but it does define causality (only events within each other's lightcones can be causally connected). Physical transfer of information (as defined by Shannon, and encoded in physical systems in Minkowski spacetime) between points in spacetime can only occur if those points are causally connected. (This SR fact is what the horizon problem, which is cited as another GR counterexample, relies on.) [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
:::Will respond to your other points later.--[[User:Aschlafly|Andy Schlafly]] 18:11, 30 March 2010 (EDT)
:::Will respond to your other points later.--[[User:Aschlafly|Andy Schlafly]] 18:11, 30 March 2010 (EDT)
:::::Yill, your grand total of contributions to this site has been 3 edits to this page, all easily refutable. Frankly, I don't think greater efforts at "formatting consistency" are justified.--[[User:Aschlafly|Andy Schlafly]] 03:01, 31 March 2010 (EDT)
:::::Yill, your grand total of contributions to this site has been 3 edits to this page, all easily refutable. Frankly, I don't think greater efforts at "formatting consistency" are justified.--[[User:Aschlafly|Andy Schlafly]] 03:01, 31 March 2010 (EDT)
::::::Your not going to be able to attract many users if you disparage newcomers with respect to how few edits they've made. I would like to be a positive contributor to this site, but I have to start somewhere. I would appreciate encouragement and constructive criticism, not condescension and personal attacks. [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
Yill, you raise excellent points, most of which have not been raised before. We should sharpen those points, here on this page, and then address them on the actual article page. This will take a fair amount of discussion. I could start by bringing up the discussion of point 7, inaccuracy of relativity at the quantum mechanical scale. One question that was raised was "Is there a discontinuity at that [microscopic boundary] distance? Such an approach is absurd.". No. The way quantum mechanics and classical theories interact at the (microscopic) scales where this happens is well known. It is, of course, generally known as the Bohr correspondence principle, described in any textbook on quantum mechanics, and known in more detail as Ehrenfest's theorem, described in more advanced textbooks. (Very briefly, the quantum mechanical realm eases into the classical realm according to the Ehrenfest theorem.) We should make some citations to those, and put in a careful explanation that, under QM, '''all''' classical theories are incorrect, and QM is the correct theory for everything, from atoms to planets. Classical theories are just extremely good approximations outside of the quantum-mechanical realm. And, of course, we do not know how that quantum-mechanical realm operated immediately after the big bang (that's what inflation theory is about), but that doesn't affect what we ''do'' know about general relativity in the macroscopic realm.
Yill, you raise excellent points, most of which have not been raised before. We should sharpen those points, here on this page, and then address them on the actual article page. This will take a fair amount of discussion. I could start by bringing up the discussion of point 7, inaccuracy of relativity at the quantum mechanical scale. One question that was raised was "Is there a discontinuity at that [microscopic boundary] distance? Such an approach is absurd.". No. The way quantum mechanics and classical theories interact at the (microscopic) scales where this happens is well known. It is, of course, generally known as the Bohr correspondence principle, described in any textbook on quantum mechanics, and known in more detail as Ehrenfest's theorem, described in more advanced textbooks. (Very briefly, the quantum mechanical realm eases into the classical realm according to the Ehrenfest theorem.) We should make some citations to those, and put in a careful explanation that, under QM, '''all''' classical theories are incorrect, and QM is the correct theory for everything, from atoms to planets. Classical theories are just extremely good approximations outside of the quantum-mechanical realm. And, of course, we do not know how that quantum-mechanical realm operated immediately after the big bang (that's what inflation theory is about), but that doesn't affect what we ''do'' know about general relativity in the macroscopic realm.
: Teach that relativity is incorrect, if you concede the point. There are relativists who claim their theory is the most precisely verified theory of all.
: Teach that relativity is incorrect, if you concede the point. There are relativists who claim their theory is the most precisely verified theory of all.
::Those relativists claim that with respect to the macroscopic realm, as KrisJ referred to above. We are discussing how it breaks down at the microscopic level, when QM starts to play a role. [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
: Gravitons are based on GR, and they are non-existent. Enough said.--[[User:Aschlafly|Andy Schlafly]] 11:37, 31 March 2010 (EDT)
: Gravitons are based on GR, and they are non-existent. Enough said.--[[User:Aschlafly|Andy Schlafly]] 11:37, 31 March 2010 (EDT)
::No, for gravitons to be a counterexample to GR, they must be predicted by it. But they are not, just as photons are not predicted by Maxwellian electrodynamics. They are the "quantum" of the gravitational field, as photons are for the electromagnetic field, and are quantum ''by definition''. GR is ''not'' a quantum theory; it manifestly does not predict them. [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
:KrisJ, I appreciate your assistance with this project. I absolutely agree with your suggestions about 7 and 10, and hopefully we can find an editor with the ability to edit protected pages to help us implement them. If you know of any that could help us, you should ask if they would be willing. [[User:Yill|Yill]] 16:49, 4 April 2010 (EDT)
== Curvature of Space ==
== Curvature of Space ==