On Jul 4, 2:02 pm, stevendaryl3...@yahoo.com (Daryl McCullough) wrote: > harald says... > > > > >On Jul 3, 4:10=A0pm, stevendaryl3...@yahoo.com (Daryl McCullough) wrote: > >> I'm not sure what paradox you are referring to, then. > > >I did some digging to understand the main cause of confusion. What I > >found, is the clock paradox started out as the one that Einstein was > >confronted with, as criticism of his GRT. At least, concerning SRT, > >before the development of GRT, I found no trace of such a paradox in > >the old literature. Did you? > > No, but I haven't really looked. But I guess it makes sense. > From the point of view of SR, it is clear that the traveling > twin is different from the stay-at-home twin, since he is in > a noninertial coordinate system. But if you generalize to allow > *any* coordinate system (inertial or not) then you have to explain > what's wrong with viewing the traveling twin at rest. > > But it's not really a paradox with GR, either, since GR doesn't > use the Lorentz transforms to relate noninertial coordinate systems. > > It's hard for me to see how the "twin paradox" is a paradox in any > sense other than being a surprising result. > > > > >> GR doesn't really *have* a notion of "rest". > > >Einstein's GRT holds that reference systems in any form of motion may > >be used as physical reference system, relative to which objects are > >"in rest" - that's the basis of the "clock" or "twin" paradox, and how > >it started. > >> For a particular coordinate system, > >> you can use the term "at rest" to mean that the time derivative of the > >>spacial coordinates are all zero, but that doesn't have any particular > >> physical meaning, except in the cases where the metric is time-independent. > > >> >> because GR is a generalization of SR. In the case of empty space far > >> >> from any large gravitating bodies, GR reduces to SR, so any GR solution > >> >> to the twin paradox would have to have already been a solution in SR. > > >> >Irrelevant. > > >> It's not irrelevant to *MY* point. It is my point. And this is my > >> thread, so my point counts. > > >Irrelevant for Einstein's clock paradox, which KW brought up in your > >thread. ;-) > > I thought KW was suggesting that Einstein used GR as a *solution* to the > paradox. I was responding to the idea that GR was a solution (whether or not > Einstein viewed it as such). > > -- > Daryl McCullough > Ithaca, NY
------------------ fucken mathematicians thik that they can solve with it all the problems ofthis universe !!: including changes in material and biological world !! the biological entity of a living crweature is billion of times more complicate than that fuckn relativity problem !! t he biological process is not meaningfully and certainly not governed by movement or those formula it shows to what extent of vanity and impertinence those mathematicians got to !! 2 a piece of metal will not as well change or become older or younger !!!