= Schwarzschild radius
{wiki=Schwarzschild_radius}
The Schwarzschild radius is a characteristic radius associated with a non-rotating black hole, named after the German physicist Karl Schwarzschild, who derived the solution to Einstein's field equations of general relativity in 1916. The Schwarzschild radius (denoted as \\( r_s \\)) defines the size of the event horizon of a black hole, which is the boundary beyond which nothing can escape the gravitational pull of the black hole, not even light.
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