– how come black holes have different density if they all have a singularity that is infinitely dense?

Question

– how come black holes have different density if they all have a singularity that is infinitely dense?

In: 3

Answer 1

This is slightly misinterpreted I think.

The mass of a black hole is concentrated in an infinitely small point, the singularity.

What we call the size of a black hole is in reality the “Schwarzschild radius”, which marks the “event horizon” which is the point where the escape velocity becomes larger than the speed of light, meaning that at this point not even light can escape the gravitational pull anymore, making it appear completely black.