Re: SR on accelerating frame of reference



Tom Roberts wrote:
> Curious wrote:
> > What's the general consensus in this group on the following question:
> > Can you apply SR principles from an accelerating frame of reference?
>
> The consensus among knowledgeable people is that SR can indeed be
> applied to accelerating coordinates. Note, however, that accelerating
> coordinates do not truly correspond to a "frame of reference" (the
> difficulty is in the word "frame", because in SR the usual
> infinitely-extended frame cannot be constructed unless it is inertial).
>
> [In GR such an infinitely-extended frame can be constructed
> only in a flat manifold (i.e. one empty of any energy or
> mass) with suitable topology. That is precisely the
> condition necessary to use SR (except SR can always be
> applied _approximately_ in a local region).]
>

Thanks very much

>
> > And if not, since the Earth is accelerating away from the far side of
> > the universe, does this pose any problems?
>
> I have not a clue what you mean by "far side of the universe", or how
> you expect to establish "acceleration" relative to it.
>
> To discuss cosmological questions (as this appears to be), one must use
> GR, not SR....
>
>
> Tom Roberts tjroberts@xxxxxxxxxx

.

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