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0 pointsoneshtein1y ago0 comments

Gravitation is slightly faster than c in vacuum.

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In GR, the speed of gravitational waves is _exactly equal_ to c.

In reality, speed of light is slightly lower than speed of gravitation, because gravitation slows down speed of light.

We were presumably talking about an ideal massless space [Minkowski] in which the speed of light in a vaccuum is considered -- that is what c is defined as.

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hyperbrainer1y ago

In GR, the speed of gravitational waves is _exactly equal_ to c.

oneshteinOP1y ago

In reality, speed of light is slightly lower than speed of gravitation, because gravitation slows down speed of light.

hyperbrainer1y ago

We were presumably talking about an ideal massless space [Minkowski] in which the speed of light in a vaccuum is considered -- that is what c is defined as.

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