What defines a black holes size?

1 Answer
Phillip E.
Mar 8, 2016

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 = (2GM)/c^2#
Where #G# is the gravitational constant, #M# is the mass of the black hole and #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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