0 upvotes, 1 direct replies (showing 1)
View submission: Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
No hair means the black hole must be smooth? E.g. the shape of whatever fell in cannot be reconstructed back after it fell?
I realize the first question now sound dirty but wtv
Comment by kftrendy at 20/07/2022 at 22:03 UTC
3 upvotes, 2 direct replies
Yes, the no-hair theorem says a stable BH can be *fully* described by its mass, spin, and electric charge. That implies that the history of stuff falling into it does not factor into the characteristics of the BH.
This leads to the black hole information paradox: Hawking radiation carries information out of the BH, but per the no-hair theorem, that information can’t be anything beyond the BH’s mass, spin, and charge. That is about the limit of my understanding though - I don’t even have a good grasp of why the information paradox is a problem, yet alone the theories people have come up with to resolve it.