#### Buzz Bloom

Gold Member

- 2,012

- 328

- Summary
- If there is no matter inside a black hole (BH) horizon, what is the nature of the mass of the BH?

I was reading another thread which has been closed, so I cannot ask this question there. The question is about a post by @PeterDonis (post #21).

### What happens to the inertia of a mass falling into a black hole?

What happens to the inertia of a mass falling into a black hole? I am not even sure if I frame the questions correctly. Will this mass reach the center or is mass distributed within the black hole? Is the singularity the whole volume of the black hole or is it a point in the center? If a large...

www.physicsforums.com

There are no internal pressures inside a black hole. A black hole is vacuum; there is no matter inside. It is not an ordinary object with matter inside that is supported against gravity by pressure.

If there is no __matter__inside the event horizon (EH) , what is the mass made of? The Friedmann equation gives four kinds of mass contributing to the manner in which the universe scale changes:(1) Radiation, (2) Matter, (3) Curvature, and (4) Cosmological Constant="Dark Energy".

If the matter inside the EH is not (2), is it one or a combination of the other three, or something else?
Last edited: