Black hole and bigbang question?

Question

Ok, so the gravity of a black hole is so strong that nothing, not even light, can escape it. How then did all the matter in the universe escape the singularity of the big bang—an infinitesimal point? My physics teacher could not answer this for me.

Answer 1

The universe did not escape the "big bang" singularity.  The universe IS the singularity, it is still "inside" it.

Answer 2

have you heard of a 'white hole'? it is the exact opposite of black hole and yet, its size is singularity.

A white hole ejects matter out, (just opposite to a black hole).

Ever heard of a 'Wormhole'? well, its

BLACK HOLE + WHITE HOLE = WORM HOLE..

there was a white hole, which, due to some fluctuations, gave out a blast of matter. This 'blast of matter is the Big Bang.

you can search the wiki page of white holes, but there is one peice of wrong information --- White holes only eject matter and cannot atract it.

Answer 3

In our universe, space itself is expanding in a sort of anti-gravity effect which overpowers the gravity of matter (as suggested by Einstein's general theory of relativity).  In a black hole, space is contracting around the singularity because of its gravity.  It has been hypothesized, however, that on the "other side" of the black hole, space may expand as a result, with the gravity of the black hole turned into anti-gravity.  So black holes could be mini-universes.

Answer 4

It's now believed that immediately after the Big Bang event our newly-born universe underwent what's come to be called "inflation." For a brief period the universe expanded *faster than the speed of light*. Don't worry -- relativity allows this because it was space that expanded FTL, not any mass within that space moving at that velocity. The period of inflation lasted long enough for space to 'escape' the Big Bang singularity.

Answer 5

Brian Greene, in his book 'The Fabric of the Cosmos', explains how during the 'inflationary' epoch (a tiny sliver of a second after the Big Bang), the expanding Universe was filled with a form of energy called a Higgs field. Without getting too technical, the Higgs field was temporarily caught in an 'energy plateau'. This contributes a uniform negative pressure, enough to begin inflation and cause the expansion to increase by a factor of 10^30 to 10^100 in a billionth of a billionth of a blink of an eye. This would be like a DNA molecule increasing to the size of the Milky Way. As mentioned previously, space can expand faster than light speed, and this would be the case here.Certainly more than enough energy to escape gravity. (it's also thought that gravity at this time exhibited a negative pressure, but that's another story).

Great book, I highly recommend it.

Answer 6

Of course, your teacher couldn't answer the question because no one can. If I could, I would already be on my way to Sweden to receive my Nobel Prize in physics! :-)

But, seriously, while both called singularities, i.e. a state where normal physic laws don't apply, the are much different, if anything, in size!

As Schrodinger Cat's experiment tend to prove, the Quantum microcosm can't be scaled up to macrocosm. Likewise, I think that a 'normal' black hole like to ones thought to be at the center of many galaxies, can't be compared to the 'big one' that the Big Bang may be.

This being said, no one knows - and probably never will know - the nature of the universe during the fraction of a second that followed the Big Bang. We don't even know if that notion of time can be compared to the present one.