Question: If gravitons travel at the speed of light, and the escape velocity of a black hole is greater than the speed of light, how is it that the gravitons can escape from the black hole?
Asked by strangeness to Arttu, Ceri, James on 23 Jun 2011.
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strangeness
commented on 23 Jun 2011: Thank you for your answer, Arttu! So gravitons just transfer “ripples”, as it were, over the curved surface of space-time?
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Even gravitons cannot escape a black hole. You should not think of a strong gravitational field as consisting of a large number of gravitons, although for weak fields that picture works. One analogy that could help you think of that is a tsunami. Gravitons are like small waves in the sea. A tsunami is a wave, too, but cannot describe it as collection of a large number of small waves.
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Yeah I agree with arttu, I don’t think anything can escape a black hole because of the curvature of space-time.
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