What defines a black holes size?

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What defines a black holes size?

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Answer 1 · 2016-03-08T14:43:48

The size of a black hole is defined in terms of its mass.

Explanation:

The size of a black hole is defined by the Schwarzschild radius:
$r = \frac{2 G M}{c^{2}}$ $r = (2GM)/c^2$
Where $G$ $G$ is the gravitational constant, $M$ $M$ is the mass of the black hole and $c$ $c$ is the speed of light.

If the black hole is spinning or has an electric charge it can alter this size by up to a factor of 2 by more complex equations.

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What defines a black holes size?

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