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Anonymous-USA t1_j581h0f wrote

But this hypothetical “mass” would be traveling faster than the speed of light, which no mass can theoretically do.

Even a massless photon cannot escape a black hole, not because of the gravity (the photon has no mass and therefore immune to gravity), but because space through which the photon travels is itself warped. So the “escape velocity” exceeds any information, mass or massless, matter or energy, past the event horizon.

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Unlikely_Concept5107 t1_j59tlj0 wrote

Im no expert but isn’t “gravity” and “warped spacetime” really just the same thing?

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Anonymous-USA t1_j5af6kl wrote

Hard to say since no one actually knows what gravity is! 😆 But the distinction I was making is that a photon has no mass, so light doesn’t actually change directions due to gravity so much as it travels a strait line through a warped space-time.

ie. Gravitational force F=(G × M1 × M2) / D^2

Photon M2 has mass of 0. This suggests it could escape the black hole as there’s no gravitational force between them, but obviously it cannot due to the curvature of space.

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