🚀 go-pugleaf

On Jul 17, 3:01 pm, Danny Milano <milanoda...@yahoo.com> wrote:
> On Jul 17, 8:53 pm, Pentcho Valev <pva...@yahoo.com> wrote:
>
> > On Jul 17, 2:37 pm, Danny Milano <milanoda...@yahoo.com> wrote in
> > sci.physics:
>
> > > Hi,
>
> > > When objects are in strong gravity. Time literally slows down
> > > (not SR wise but literally) such that in the moon, time is
> > > faster because earth gravity make our time slower.
>
> > > According to a famous anti-relativist who wrote an
> > > award winning book. The explanation is related to
> > > what Mitchell said that when object moves from
> > > low gravity to high gravity, there is loss of energy and
> > > reduction of frequency and increase of wavelength
> > > and this causes redshifting. Time slows down too as
> > > a result of this by causing influences on the atoms.
> > > This is a newtonian explanation against the pure
> > > spacetime concept where time slows down because
> > > of the geometry distortion.
>
> > > IIs the newtonian explanation possible? Can it be
> > > falsified by empirical data?
>
> > > Danny
>
> > There is a textbook formula:
>
> > (frequency) = (speed of light)/(wavelength)
>
> > that both relativists and anti-relativists accept. According to this
> > formula, if the frequency decreases in a gravitational field, then
> > either the wavelength increases and the speed of light remains
> > constant, or the speed of light decreases and the wavelength remains
> > constant. Which alternative is physically more reasonable?
>
> I'm talking of the purely temporal aspect. Baird said the
> GPS doesn't have to use GR because there is also
> a newtonian explanation for gravitational time dilation.
> I wonder what's the consensus about this. Anyone
> can illustrate what it means?

I am not sure about Baird's claim but in any case gravitational time
dilation is consistent with the first alternative (the wavelength
increases and the speed of light remains constant) and inconsistent
with the second (the speed of light decreases and the wavelength
remains constant). That is, if the second alternative is correct,
gravitational time dilation simply does not exist. Note that the
second alternative is consistent with Newton's emission theory of
light.

Pentcho Valev
pvalev@yahoo.com