3 ms·
Black holes don't have a volume, they only have a surface area, and it depends strictly on their mass.
by philipov 4y ago
Black holes don't have a volume, they only have a surface area, and it depends strictly on their mass.
- ravi-delia 4y agoAnd spin/charge, no?
- nathan_compton 4y agoThis isn't true at least in the case of the ordinary black hole solutions in general relativity. These solutions tend to be valid throughout the volume of the black hole (except at the singularity, which takes on different shapes depending on spin or charge but doesn't occupy the whole interior volume of the black hole if you think of the event horizon as bounding the volume).
- tyfon 4y agoI thought they were valid throughout the volume/radius, but that the solution only gives you the surface area for that radius, not the volume. Perhaps I have misunderstood though as I am just a hobbyist :)
- nathan_compton 4y agoThe volume inside the event horizon isn't what you would expect if you consider the black hole as a sphere with its external area, but it has a volume. It might be the case that in quantum gravity there isn't an interior, but in GR the idea of the volume is a little weird, but not problematic.