sci.physics.particle

wrote in message
news:45ca494c-1baa-45fd-8eb9-7b47d5e88ba2@s8g2000prg.googlegroups.com...
On Mar 6, 9:02 pm, pmb wrote:
> On Feb 26, 2:18 am, va...@cox.net wrote:
>
>
>
>
>
> > On Feb 25, 10:03 pm, pmb wrote:
>
> > > On Feb 25, 2:24 pm, "Paul B. Andersen"
>
> > > wrote:
> > > > Juan R. González-Álvarez skrev:
>
> > > > > Tom Roberts wrote on Mon, 25 Feb 2008 15:47:04 +0000:
>
> > > > >> The best model we have for the propagation of light near a
> > > > >> massive
>
> > > > > no.
>
> > > > >> object like the sun is GR, in which the curvature of spacetime is
> > > > >> the
> > > > >> important aspect in determining the path light follows. And it
> > > > >> agrees
> > > > >> with measurements to part-per-million accuracy over an enormous
> > > > >> range.
>
> > > > > Theories without spacetime curvature also agree with that.
>
> > > > Could you name one of those theories, please?
>
> > > Personally I know of no such theories. However spacetime curvature is
> > > not neccesary for light deflection in a gravitational field. So long
> > > is there is a gravitational field present, i.e. non-vanishing
> > > connection coefficients, then a particle can be deflected. A uniform
> > > g-
> > > field is a perfect example. The spacetime curvature associated with a
> > > uniform gravitational field is zero and yet a beam of light will be
> > > deflected. Geometrically speaking the deflection is described as the
> > > observer corresponding to a frame of reference for which a geodesic
> > > represents a non-straight line in space, i.e. one changes from
> > > Minkowski coordinates to "curvilinear" coordinates. Spacetime
> > > curvature is only neccesary when geodesic deviation is expected.
>
> > >Pete- Hide quoted text -
>
> > > - Show quoted text -
>
> > HiPete
>
> > I remember Kip Thorne commenting, in his non-mathematical book on the
> > history of gravitational physics, that he occasionally liked to use
> > teleparallel gravity to evaluate gravitational wave phenomena.
> > Teleparallelism is a GR equivalent.
>
> >http://en.wikipedia.org/wiki/Teleparallelism
>
> > Bruce- Hide quoted text -
>
> > - Show quoted text -
>
> Hi Bruce
>
> Thanks. I've heard of that but have not had the time to learn about
> it. Other subjects have taken a higher priority lately. Thanks for
> reminding me of it. Do you know much about this subject? How is
> Schitz's "Gravity from the ground up?" going? Have you finished
> reading it? If so how did you like it?
>
> Best wishes

| Hi Pete

| The limit of my GR knowledge is founded in the metric equations which
| I learned to use when I worked through Edwin's book.

The limit of your knowledge is learning how to push the "radians" button
on your hand "help" calculator, fuckhead.