what are the new theiories about the black holls?

Question

The theiory of steven hockins

Answer 1

black holes happen when stars colapse. Stars are massive fusion engines. Their mass alone should make them colapse on themselves due to gravity but the nuclear fusion reactions going on in them where hydrogen atoms are being smashed together and forming helium atoms create huge constant explosive energy forcing the gasses in a star outward. Eventualy the hydrogen gets used up. The fuel for the star is gone and the star has nothing to keep it's mass from collapsing on itself. All the star's gas molecules attract each other toward the center through the force of gravity and finaly all that mass which had taken up the space of thousands of planets is contained in the space of, ooohhhh I don't know a bowling ball.

That small ball of used up star has a huge density. Density is mass divided by volume. For example, A nerf ball and a small marble may both weigh the same, but the nerf ball has a larger volume so the density is smaller and therefore the nerf ball is softer and if it has a density less than 1g/cc it will float while the marble will sink.

See when the the mass is in the numerator and the volume is in the denomenator is the volume. As the volume (denomenator) gets bigger while the mass (in the numerator) stays the same the whole number gets bigger.

This is what happens in a black hole as it collapses. It has the same number of gas molecules as it collapses but they get closer together and the volume gets smaller. Let's say the mass of the star is 1 and watch what happens to the density as you divide it by a smaller and smaller number.

1/10 = .1

1/1 = 1

1/.01 = 10

1/.001 = 100

1/.000 1 = 1000

1/.000 01 = 10 000

See as the mass stays the same and the volume decreases the density gets bigger. It quickly approaches infinity. Math doesn't handle infinity well and we can't predict what happens at this point. We call a point of infinite density a singularity.

This singularity in a black hole has a huge density and huge gravity so nothing can get out, not even light, hence the name BLACK HOLE.

So how do we know they're there? We can see the efects of the black hole on other stars and Stephen Hawkins predicted that the black holes would actualy emit radiation which was detected proving him right and proving black holes.

Answer 2

That's not a new theory and is well established, he theorised the Hawking Radiation which has been observed.