The schwarzschild radius is the distance from an object at which the escape velocity is equal to the speed of light. a black hole is an object that is smaller than its schwarzschild radius, so not even light itself can escape a black hole. the schwarzschild radius depends on the mass of the black hole according to the equation = where is the gravitational constant and is the speed of light. consider a black hole with a mass of 5.7×107m⊙. use the given equation to find the schwarzschild radius for this black hole. schwarzschild radius: m what is this radius in units of the solar radius