How are some black holes’ event horizons bigger than others?

Question

If their mass is always contained in a singularity and their density is infinite, how are some black holes supermassive and others are not?

In: 5

Answer 1

There’s no such thing as a singularity. A singularity is where the maths breaks down and can’t explain what is actually happening. It’s a placeholder.

The mass inside a black hole is not a singularity but instead is some non zero size. We just don’t have the theories to explain what is actually going on but it is not accepted that it’s in an actual singularity.