Schwarzschild radius

Schwarzschild radius

Einstein's theory of relativity gives Rs = 2GM/c^2 as the Schwarzschild radius, where G is the gravitational constant,M is the mass of the object, and c is the speed of light.


First time I see it, and Its 11hrs before my Physics.

But come to think about it, it was never taught, but it appeared in the online tutorial. =/

Interesting Facts

The Schwarzschild radius of an object is the distance within which nothing, not even light, can escape its gravitational attraction. The sphere surrounding a black hole whose radius is the Schwarzschild radius is also called the event horizon.

It would be possible for the earth to orbit the black hole at the same distance that it is from the sun without falling into the event horizon. However, since the black hole is much more massive than the sun, the speed of the earth's orbit would be incredibly high. In fact, if our sun were replaced by the black hole, it would make one earth year (the time to make one complete orbit) equal to just a few hours!