Recent content by Vorpal

If you have a clock traveling in the x-direction with speed v with not acceleration, then its internal state changes and can be parametrized by λ = x-vt (incidentally also an affine parameter that is definitely not the proper time). Whatever it's really doing is not particularly relevant, just...

To do this, you would have to break the principles of special relativity by introducing an absolute frame. One can generalize this slightly by introducing a scalar field t that serves as the absolute time of an event. Then the resulting Newtonian-SR gravitational acceleration on a particle with...

Your wordline is timelike. Light's wordline isn't. Thus, there no symmetry to be enforced. Yet the FAQ is mistaken (bracketed addition mine): "One of the key axioms of special relativity is that light moves at c in all [inertial?] reference frames." Without the additional qualifier of...

Oh, I agree with your position that space/time reversal is "an artifact of that particular coordinate system". My primary concern was that even a statement like that is prima facie suspect and might not be meaningful, because there are two disconnected coordinate charts. The alternative would...

The standard Schwarzschild coordinates are actually two disjoint coordinate charts. So even in saying that the space and time flip in Schwarzschild coordinates, we have to be careful to interpret that sensibly, because there are two, not related by any transition map. But there are other...