I've got further clarification from sci.physics.relativity.
A.T's reply is the one I am looking for and it is resolved now for me. GR's stuff is no for me yet.
Thanks all.
I only have a vague idea of SR, not GR. I read the wiki article and don't understand about the "measure ...average over finite distance" part.
I have a few questions:
1) If I simplify my question - If an experimenter on a space-lab (near some mass ), that can accelerate in any smooth manner...
2 textbooks I have give postulate 2 of SR as:
"The speed of light in vacuum is constant in all inertial reference frames".
But "Classical Dynamics" by Jerry B. Marion has:
"The velocity of light in free space is a universal constant independent of any relative motion of the source and...
We could argue about the "goodness" of the two Feynman clocks, that such light clocks are not "good" if we don't know if the speed of light in both directions are the same.But in this manner we could always use the "badness" of clocks to reject any findings. In the case of the experiment which...
Nothing is assumed about proper time or about any frames comparisons. Only assumption is all type of clocks (and orientation) give the same reading. Each of the two Feynman light clocks could have been accompanied by a any similar precision mechanical clocks to collaborate their readings which...
From "The conceptualization of time and the constancy of the speed of light", Vasco Guerra and and Rodrigo de Abreu.
I just came across this article which proves that the speed of light had to be constant by just assuming "good" clocks record time correctly irrespective of orientations...