- #26

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Me <<Yes, that is what it indeed is. Why do you consider that to be an error?>>

sgralla <<If you choose some other coordinates, and compute dr/dt for those, you'll get a different answer. Which one represents the "speed of light propagation" in this spacetime? If you want to calculate something about light, you need to ask a question that doesn't depend on the choice of coordinates.>>

You are acting as if the speed of something should not depend on the coordinate system, when in fact it should.

A different coordinate system can indeed have a different speed for the wave. The metric components g00 and g11 will of course be different too, and thus the square root of g11/g00 formula still applies.