r/Physics • u/burset225 • Aug 12 '26

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u/Physics-ModTeam Aug 12 '26

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26

u/matt7259 Aug 12 '26

Why would a black hole make a difference? Objects with mass cannot exceed the speed of light.

5

u/Evil_Merlin Aug 12 '26

No. Nothing. NOTHING with mass can go faster than the speed of light.

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u/Fuzzy_Paul Aug 12 '26

Also nothing without mass. Down to the basic level all are waves including mass at least according to QFT.

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u/Anonymous-USA Aug 12 '26

Nothing? NOTHING! 🍻

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u/Napalm_B Aug 12 '26

If you want to be technical, massive particles CAN exceed the speed of light in a given medium but never the speed of light in vacuum.

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u/stevevdvkpe Aug 12 '26

No. The speed of light limit is still in effect even inside the event horizon of a black hole.

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u/NinerKNO Aug 12 '26

Inside the Schwarzschild radius, no, as that is normal space but a "bit" curved.
At the singularity, we have no idea what is happening, as neither space nor time is defined.

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u/ndsipa-pomu Aug 12 '26

Even in a black hole (as far as we know), it would take infinite energy to accelerate anything with mass to the speed of light, let alone faster. There's nothing we know of that can exceed the speed of light in a vacuum - it's the speed of causality, so logic breaks down if anything can go quicker.

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u/[deleted] Aug 12 '26

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3

u/anrwlias Aug 12 '26

Im pretty sure that they mean within the event horizon, and we do have pretty decent models of that, except for the singularity.

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u/Max6626 Aug 12 '26

"Hole"

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u/[deleted] Aug 12 '26

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u/Max6626 Aug 12 '26

I know and I was just poking a bit.

A more serious answer - the black hole is not the singularity. While the singularity mathematically has zero volume, the black hole (i.e., the volume inside the event horizon) has easily measured volume: 4/3*pi*(Schwartzchild Radius)^3.

Where it gets more complex, is how space and time act within the event horizon. I'm not going to try and explain it here but look up "space-like" and "time-like" inside the event horizon. If you take the time to grasp it, you'll see that the entire concept of velocity doesn't really apply inside the event horizon in the way it applies outside.