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Talk:Counterexamples to Relativity

1,195 bytes added, 04:19, January 9, 2012
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15: General relativity ''does not predict gravitons!'' Gravitons are massless spin-two particles predicted by QFT that lead to linear GR. (Though the spirit is different; in QFT, the h's--the metric perturbations--are a tensor representing field strength on a background Minkowski spacetime. In GR these represent curvature in spacetime.)
<br />18: Untrue--Consider the Dirac equation. It predicted spin, which was not predicted by Schrodinger theory. It also predicted negative energy states (antiparticles), and QFT has been fundamental to particle physics.
<br />1924: Yet another horrible misunderstanding. Consider an ideal gas with N particles. Assume the total number of particles is conserved (it obviously doesn't have to be, but this is an idealized case). First of all, Newtonian gravity also predicts that a star will contract to a point without hydrostatic pressure--due to their mutual gravitational attraction. Should we start a "counterexamples to gravity" page? You've forgotten one thing: ''there's a term in the expression for the entropy that involves thermal energy!!!'' In other words (roughly speaking) the gas "warms up" so that the second law of thermodynamics is not violated. [[User:AndyFrankinson|AndyFrankinson]] 20:43, 8 January 2012 (EST) ::Very well said! While I'm in a commenting-frenzy, I'd like to add to your points. ::'''Re: #15.''' It's not a waste of time or money to reject a hypothesis. To quote Enrico Fermi, "If the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery." ::'''Re: #18.''' Relativity HAS led to other [http://curiosity.discovery.com/topic/relativity/discoveries-relativity-made-possible.htm|insights]. ::'''Re: #24.''' The second law of thermodynamics only applies to closed systems. In the case of stellar black hole formation, gravitational pressure must exceed the sum of the thermal pressure, supplied by ongoing fusion in the stellar core, and the core degeneracy pressure, provided courtesy of the Pauli exclusion principle. Achieving this condition is, necessarily, a very violent event, complete with giant explosions, gamma ray bursts, and spewing jets of super-heated gas. When considering the entirety of the system giving rise to a black hole, and not just the resulting black hole itself, entropy certainly ''does'' increase. --[[User:RudrickBoucher|RudrickBoucher]] 23:19, 8 January 2012 (EST)