Can it hit the speed of light? And what even happen if it does?
No, I don’t believe so. See quote below, emphasis mine.
The spin speed of a black hole is defined as “a” and given a value from 0 to 1, with 1 being the maximum rotational speed to a particular black hole, which is a significant fraction of the speed of light. Ruth A. Daly, a physicist at Penn State, and colleagues found that the rotational speed of Sgr A* is between 0.84 and 0.96 — close to the top limit defined by a black hole’s width. The team described Sgr A*'s blistering speed in a study published Oct. 21 in the journal Monthly Notices of the Royal Astronomical Society.
Ye I read that but the title seemed to imply it is continuing to get faster
it can continue to get faster but would not reach the speed of light. energy needed to accelerate it further reaches infinity as its speed approaches the speed of light. so it can get arbitrarily close to that speed, without ever reaching it.
As far as we understand today, nothing that has mass can travel at the speed of light because it would require infinite energy to reach that speed.
Black holes have infinite density, so they have a good start on breaking some rules.
That’s not known. Relativity predicts that they shrink to an infinitely dense singularity, but we don’t know that relativity is still applicable in that environment. They could shrink to a small but finite volume, or they could stay at uniform density within the sphere of the event horizon (which would make SMBHs less dense than water), or space could just stop at the event horizon and there wouldn’t even be an inside. And all those possibilities would look identical from the outside.
Please swallow the entire galaxy… Just let this shit end already.
