Zdravei,

shte se radvam pak da pogovorim po temata; po-kusno shte pocheta po vaprosa. Samo purvo da dadem definiciata na Schwarzschildovia radius, za tezi (kato men!) koito ne znaiat kakvo e:

What is the Schwarzschild radius?

How small must an object be to trap light? Einstein's general theory of relativity provides an answer. Just after the general theory's publication, the German astrophysicist Karl Schwarzschild (1873-1917) calculated this critical size, now called the Schwarzschild radius. For the sun the Schwarzschild radius is about 3 km, smaller than the typical sunspot. If it were compressed to this size, the sun would have a density of about 1E19 kg/m^3. The mass of any object directly gives its Schwarzschild radius: Radius=3 km * M / Msun. For 1 solar mass, it's 3 km; for 2 solar masses, 6 km; for 10 solar masses, 30 km; and so on.

How can a star get as small as its Schwarzschild radius? Two ways are possible. First: runaway gravitational collapse. If you put together more mass than about 3 solar masses, a star must eventually squeeze itself into a black hole. Nothing we know about, not even the hardness of matter itself when it gets to nuclear densities, can stop this final crushing. Second: a supernova, a star's self-destruction, can slam matter into a size smaller than its Schwarzschild radius. The final result of either path is the singularity.
(ot

Съдържаниет е скрито
Влезте за да го видите