On May 30, 1:10 pm, Melvin Barnes <
melvin...@hotmail.com> wrote:
> Koobee Wublee wrote:
> > Imagine if there is no gravitational time dilation. Can a photon
> > traveling near the sun be observed to shift in position? If either the
> > photon or the observer is located well under the influence of curved
> > space, this will indeed be the case. However, if the photon starts out
> > and ends well outside of (flat space) the influence of curved space,
> > would the observed position still shift to indicate a bending in the
> > photon’s path? <shrug>
>
> This bother me as well. The curvature of space around the Sun must be so
> insignificant small, according to applied Relativity.
Yes, the degree of curvature in space according to the Schwarzschild
metric is (2 U) where (U = G M / c^2 / R, R = radius of the sun) which
is about 2 parts per million. <shrug>
The point is that the photon starts out in flat space, and it is
observed in flat space. In between, it travels through space that is
slightly curved. Regardless curved space or not, light will also
travel in a straight line locally. Thus, Koobee Wublee’s argument is
that curved space itself manifests no photon deflection. All
deflection should come from gravitational time dilation. The result
of the deflection should be the same as Newtonian prediction. <shrug>
> I have no idea how
> they postulate a star observation behind the Sun. Not being overlapped /
> overshadowed by the light from the Sun, strange.
Yes, even for today’s technology, it is still rather challenging.
They have to compare the chart of stars when the sun is not around
versus the chart during a solar eclipse. Other than Eddington’s work,
this has never been done before. Instead, the photon delay is
construed as photon deflection as per Shapiro’s work on bouncing radio
signals off Venus when Venus is on the other side of the sun. <shrug>
> A total eclipse does not help whatsoever since the light from the Sun, the
> photons emitted omnidirectional, IS/ARE STILL THERE. A Moon will not take
> those away, the Moon cannot cancel anything, except the small part where
> it shadows.
>
> However, even a perfect solar eclipse will not shadow the Sun completely.
Not sure what you are saying and not sure what your point is. <shrug>