What does that mean, a black hole "rotates"?

Asked Mar 15 '18 at 15:17

Active Mar 15 '18 at 18:41

Viewed 51 times

A black hole has:

In the inner, there is a singularity, all the mass, collapsed to one point. The event horizon is surrounding that singularity.

How can a point rotate? What is meant when speaking about a one-dimensional thing rotating?

edited Mar 15 '18 at 18:41

Qmechanic

asked Mar 15 '18 at 15:17

Asqiir

"How can a point rotate?" - why do you ask about a point singularity in this context? From the Wikipedia article "Ring singularity", find: "A ring singularity or ringularity is the gravitational singularity of a rotating black hole, or a Kerr black hole, that is shaped like a ring." – Alfred Centauri Mar 15 '18 at 15:32
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Similarly, an electron also has intrinsic angular momentum (spin) even though it too is a point particle. – Lewis Miller Mar 15 '18 at 15:33
Up voted Lewis Miller but I would like to undo.... – Alchimista Mar 16 '18 at 09:53

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