http://www.physicsforums.com/showthread.php?t=237212
On Wed, Feb 26, 2014 at 5:49 PM, John Berry <[email protected]> wrote: > On Thu, Feb 27, 2014 at 1:41 PM, leaking pen <[email protected]> wrote: > >> Berry, I'm fairly certain that is dilation from the velocity copresent >> with the acceleration. Technically acceleration is a measure of how fast >> the velocity is being changed by the application of force, right? >> > > But that would need another object with a relative frame which isn't > mentioned. > > And most importantly it clearly states that "gravitational time dilation" > is co-present, not that SR's form of time dilation is copresent from the > velocity produced! > > >> Alain, the distortion they have is from their velocity of travel towards >> or away from us in orbit. >> >> >> >> On Wed, Feb 26, 2014 at 5:26 PM, Alain Sepeda <[email protected]>wrote: >> >>> note that GPS satellites have experienced that phenomenon. >>> since they experience different gravity field (in fact they are in >>> freefall, unlike us walkers), they experience time dilation/contraction >>> >>> >>> 2014-02-27 0:40 GMT+01:00 John Berry <[email protected]>: >>> >>> On Thu, Feb 27, 2014 at 12:12 PM, leaking pen <[email protected]>wrote: >>>> >>>>> Not at all, however, if you are accelerating at a rate away from the >>>>> body that the clock is falling towards, >>>>> >>>> >>>> No offence to you, but I thought that misunderstanding this was >>>> impossible. >>>> You are not accelerating away from a gravity source the clock is >>>> falling towards. >>>> >>>> These are 2 separate experiments related toEinstein's thought >>>> experiment about either being in an elevator and being subjected to uniform >>>> acceleration in free space (no gravity). >>>> OR being in an elevator sitting on the ground. >>>> >>>> You can't tell which test you are undergoing everything seems >>>> identical, So I am adding a test, you drop a clock, the instant the clock >>>> on the accelerating elevator is let go of it assume a constant relative >>>> velocity to every other object in space that is confusingly termed an >>>> inertial reference frame, it is no longer accelerated. It can not be >>>> readily justified to experience time dilation from acceleration it isn't >>>> undergoing. >>>> >>>> So either the same happens in the elevator test on the planet in the >>>> gravity field also (which would be very dramatic in a black holes time >>>> dilation field) OR it doesn't and the equivalence principle falls over, at >>>> least wounded. >>>> >>>> As far as I am aware and can tell from looking, neither conclusion is >>>> expected, but one must be true, or something even stranger that is also not >>>> predicted a time dilation aura effecting objects around an accelerating >>>> object. >>>> >>>> The rest you wrote as far as I could tell did not relate to what I am >>>> proposing. >>>> >>>> John >>>> >>> >>> >> >
