🚀 go-pugleaf

On Jan 27, 12:46 pm, Pentcho Valev <pva...@yahoo.com> wrote:
> On Jan 14, 5:17 pm,PentchoValev <pva...@yahoo.com> wrote:
>
> > http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html
> > SteveCarlip: "Einstein went on to discover a more general theory of
> > relativity which explained gravity in terms of curved spacetime, and
> > he talked about the speed of light changing in this new theory.  In
> > the 1920 book "Relativity: the special and general theory" he wrote:
> > ". . . according to the general theory of relativity, the law of the
> > constancy of the velocity of light in vacuo, which constitutes one of
> > the two fundamental assumptions in the special theory of relativity
> > [. . .] cannot claim any unlimited validity.  A curvature of rays of
> > light can only take place when the velocity of propagation of light
> > varies with position."  Since Einstein talks of velocity (a vector
> > quantity: speed with direction) rather than speed alone, it is not
> > clear that he meant the speed will change, but the reference to
> > special relativity suggests that he did mean so.  THIS INTERPRETATION
> > IS PERFECTLY VALID AND MAKES GOOD PHYSICAL SENSE, BUT A MORE MODERN
> > INTERPRETATION IS THAT THE SPEED OF LIGHT IS CONSTANT in general
> > relativity."
>
> > http://www.fordham.edu/halsall/source/loyola-spirex.html
> > Ignatius ofLoyola: "To be right in everything, we ought always to
> > hold that THE WHITE WHICH I SEE, IS BLACK, if the Hierarchical Church
> > so decides it...."
>
> http://media.www.californiaaggie.com/media/storage/paper981/news/2005/12/07/ScienceTech/Professor.Profile.Steven.Carlip-1123328.shtml
> Who would you rather be: a student or professor?
> Steven Carlip: A professor, especially one with tenure.

The professor, especially the one with tenure, solves once and for all
the problem with the constancy/variability of the speed of light
(Einstein zombie world should realize that it does not make sense to
even talk about this problem):

http://groups.google.com/group/sci.physics.research/browse_frm/thread/674cdc5f74c1911e?
Steve Carlip, Mar 30, 2004: "More generally, there is a strong
argument that it doesn't make sense to talk about the variation of a
dimensionful constant like c; only dimensionless quantities are really
measurable."

Pentcho Valev
pvalev@yahoo.com