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Talk:Counterexamples to Relativity (view source)
Revision as of 09:29, January 13, 2012
, 09:29, January 13, 2012→A few more things: did not predict the accelerating expansion of the universe
:::'''re: 18.''' General relativity correctly predicted gravitational lensing, the existence of black holes, and the accelerating expansion of the universe. Additionally (and this is the first example that I can come up with off of the top of my head, RSchlafly probably knows a few better ones), relativistic effects must be compensated for to maximize the accuracy of satellite-based GPS systems.
:::'''re: 18.''' General relativity correctly predicted gravitational lensing, the existence of black holes, and the accelerating expansion of the universe. Additionally (and this is the first example that I can come up with off of the top of my head, RSchlafly probably knows a few better ones), relativistic effects must be compensated for to maximize the accuracy of satellite-based GPS systems.
:::'''re: 24.''' Black hole formation results in a net increase in entropy when considering the system as a whole. If you were to consider just the mass of the resultant black hole as a closed system, the degeneracy forces outweigh the net gravitational force significantly enough to prevent collapse into a schwarzchild radius. In just overcoming this by itself (as theoretically happens in super-massive black holes), there would be a massive output of emitted particles (radiation), which would still result in a net increase in the entropy of the system.
:::'''re: 24.''' Black hole formation results in a net increase in entropy when considering the system as a whole. If you were to consider just the mass of the resultant black hole as a closed system, the degeneracy forces outweigh the net gravitational force significantly enough to prevent collapse into a schwarzschild radius. In just overcoming this by itself (as theoretically happens in super-massive black holes), there would be a massive output of emitted particles (radiation), which would still result in a net increase in the entropy of the system.
:::These counterexamples are not valid. Plain and simple. --[[User:RudrickBoucher|RudrickBoucher]] 01:10, 13 January 2012 (EST)
:::These counterexamples are not valid. Plain and simple. --[[User:RudrickBoucher|RudrickBoucher]] 01:10, 13 January 2012 (EST)
:::: General relativity did not predict the accelerating expansion of the universe. It predicted that the expansion would be slowing. Most physicists say that the GR equations must be modified to accommodate the accelerating expansion.
:::: I don't get the entropy argument. I always assumed that a black hole would have all the entropy of the collapsing star and matter falling in. Is there a source for saying that black holes have low entropy? As the footnote says, Hawking has an explanation. Is there something wrong with that explanation? [[User:RSchlafly|RSchlafly]] 04:29, 13 January 2012 (EST)