Erratum The fact that two of the biggest ideas in modern physics are logically incompatible just goes to show that despite what modern physicists claim they don't give a damn about logical consistency.
Harry On Mon, Nov 3, 2014 at 10:46 PM, H Veeder <hveeder...@gmail.com> wrote: > The fact that two of biggest ideas in modern physics are logically > incompatible just goes to show that despite what modern physicists claim > they don't give a damn about logically inconsistency. > > Harry > > On Mon, Nov 3, 2014 at 1:30 PM, Foks0904 . <foks0...@gmail.com> wrote: > >> Wow. TYVM >> >> On Mon, Nov 3, 2014 at 12:37 PM, H Veeder <hveeder...@gmail.com> wrote: >> >>> Energy is not conserved >>> >>> >>> http://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/ >>> >>> quote >>> >>> <<I like to think that, if I were not a professional cosmologist, I >>> would still find it hard to believe that hundreds of cosmologists around >>> the world have latched on to an idea that violates a bedrock principle of >>> physics, simply because they “forgot” it. If the idea of dark energy were >>> in conflict with some other much more fundamental principle, I suspect the >>> theory would be a lot less popular. >>> >>> But many people have just this reaction. It’s clear that cosmologists >>> have not done a very good job of spreading the word about something that’s >>> been well-understood since at least the 1920′s: energy is not conserved in >>> general relativity. (With caveats to be explained below.) >>> >>> The point is pretty simple: back when you thought energy was conserved, >>> there was areason why you thought that, namely time-translation invariance. >>> A fancy way of saying “the background on which particles and forces evolve, >>> as well as the dynamical rules governing their motions, are fixed, not >>> changing with time.” But in general relativity that’s simply no longer >>> true. Einstein tells us that space and time are dynamical, and in >>> particular that they can evolve with time. *When the space through >>> which particles move is changing, the total energy of those particles is >>> not conserved*. >>> >> >>> >>> Harry >>> >> >> >
