Re: Einstein's Train Gedanken Re-visited

"Bruce Richmond" <bsr3997@xxxxxxxxxxx> wrote in message news:e5e3aac9-be6e-48e9-bb6a-2936b6dca28c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jun 22, 11:38 pm, "Dono." <sa...@xxxxxxxxxxx> wrote:
On Jun 22, 5:33 pm, Bruce Richmond <bsr3...@xxxxxxxxxxx> wrote:



> The Hafele-Keating experiment *was* conducted in the non inertial
> frame of the earth's surface. That is why the two directions did not
> give the same result.

The HKX was conducted in the air, about 30,000 ft from the eart's
surface.
The calculations for it were executed in the frame of reference whose
origin is coincident with the center of the Earth. This is the same
frame of reference as the one used by GPS calculations (called EFI in
the GPS). This frame is as close to an inertial frame as we can get.
The reason the clocks showed different elapsed times is the same one
as the one in the little problem I challenged Whoever to solve: the
palnes with the clocks on board had different speeds wrt EFI.

But the bottom line is that when the clocks were brought back together
on the surface of the earth their settings had changed. We're not
talking about "according to calculations" here, we are talking their
actual settings as *measured* in the real world.

I think he means that the calculations of the expected results. And the observed results verified that (within experimental error).

So .. what would happen if we moved the clocks apart at the same speed according to the (almost) inertial frame of the center of the earth. So (for example) the one moving with the earth would stay 'still' (relative to the earth) and the other one move away at twice the speed of earth's rotation in the opposite direction. Would they be synchronized relative to the centre of the earth frame? Would they be synchronized as far as an observer that stayed with the first clock? Could we then use those clocks for OWLS .. (if they aren't too far apart so one 'disappears' over the horizon from the other) and would anyone object ? What if the second clock went all the way around the earth and returned back to the first clock .. do you think they would they show the same time?


.

Relevant Pages

  • Re: Einsteins Train Gedanken Re-visited
    ... the one moving with the earth would stay 'still' ... see we need to make it explicit) what do you claim about the clocks ... appropriate speed would keep it in sync. ... frame would then be inertial. ...
    (sci.physics.relativity)
  • Re: Kepler ,Newton and orbital geometry
    ... frame any time they need to. ... It is the actual time it takes the Earth ... clocks in sync with the axial cycle are lovely and easy to understand ... Huygens showing how clocks,the axial cycle and terrestrial longitudes ...
    (sci.astro.amateur)
  • Re: Einsteins Train Gedanken Re-visited
    ... the one moving with the earth would stay 'still' ... I thought the whole purpose of this exercise was to get clocks in sync ... frame would then be inertial. ...
    (sci.physics.relativity)
  • Re: Einsteins Train Gedanken Re-visited
    ... the one moving with the earth would stay 'still' ... I thought the whole purpose of this exercise was to get clocks in sync ... frame would then be inertial. ...
    (sci.physics.relativity)
  • Re: Einsteins Train Gedanken Re-visited
    ... The calculations for it were executed in the frame of reference ... The reason the clocks showed different elapsed times is the same ... on the surface of the earth their settings had changed. ... opposite directions at the same velocity and stop them ...
    (sci.physics.relativity)
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