Submitted by ThePropagandaTower t3_10her99 in space
Anonymous-USA t1_j5af6kl wrote
Reply to comment by Unlikely_Concept5107 in The critical atom (thought experiment) by ThePropagandaTower
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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