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

The Schwarzschild radius of black hole is a product of its mass. More mass = larger event horizon. Density is irrelevant. Also, the concept of a singularity is not really a valid things and hasn’t been for a while. There’s no actual point of infinite density. A singularity is a mathematical problem that arises because our physics breaks down at that point.