In an article in Phys.Org, concerning Franson's measurement that suggest that the speed of light is not constant, or at least has a different value from the currently accepted value, the say "
"The theory of general relativity suggests that light travels at a constant speed of 299,792,458 meters per second in a vacuum.
Read more at: http://phys.org/news/2014-06-physicist-slower-thought.html#jCp"
I thought that the fact that 'c was the maximum speed came from Special Relativity. You take the formulas for adding two speeds and show that neither can exceed the speed of light.
In fact, I was beginning to think that because space is not perfectly flat and getting worse, the rules of General Relativity might allow the speed to vary with wavelength.
Any comments welcome.
Light from the sun for example, would take longer to reach us than thought,
Is not this the Shapiro delay experiment stating that speed of ligth is not constant crossing a gravitational field??
Einstein himself demonstrated that the light bending is due to a non constant speed of light. As far as I know speed of light is the same if we measure it in any reference frame as long as we measure it locally. If we make a global undirect measurement it varies with gravitational potential.
Thank you. Yep, I need to revisit GR.
OK. After Big Bang, everything is accelerating. So why is there a horizon problem?
Maybe the acceleration has to be orthogonal to the motion. In other words, the limit of 'c' applies to bending and not just linear acceleration.
It is only when the 'explosion' stops that everything starts to belong to some common framework(s). But by then, it could have all expanded well over most particle horizons.
Because the framework itself, the space-time moves faster than the speed of light..it may expand more faster...what cannot move faster is what is inside the framework...
Got it! Thanks. Now I see why the concept of Inflation works.
But, Hmmm! My next step is to......
No! My next step is to think my next idea through thoroughly before I go more public.
Thanks.
I think the seeds to overcome GRT are in GRT itself:
Einstein equivalence principle which violates the energy conservation
The speed of light which has to be variable in order to account for the gravitational lensing (the equivalence principle does not have a clue)
The speed of light which has to be variable in order to account for the massless photon and gravitational redsifht and conservation of energy.
Article "SPEED OF CLOCKS IN A GRAVITATIONAL FIELD" A FEYNMAN’S LECTU...
Thanks again. I'm on a slightly different channel, but it will obviously chain into yours first.
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