| 单词 | Schwarzschild radius |
| 释义 | Schwarzschild radius A critical radius of a body of given mass that must be exceeded if light is to escape from that body. It is equal to 2GM/c2, where G is the gravitational constant, c is the speed of light, and M is the mass of the body. If the body collapses to such an extent that its radius is less than the Schwarzschild radius the escape velocity becomes equal to the speed of light and the object becomes a black hole. The Schwarzschild radius is then the radius of the hole's event horizon. The concept was devised by the German astronomer Karl Schwarzschild (1873–1916). See also death of a star |
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