07-20-2010, 12:48 PM
(07-20-2010, 06:03 AM)billy Wrote: how big would a black hole have to be to start a singularity. and could it account for the forming of a universe?
FYI, all black holes are singularities.
In 1971 physicist Stephen Hawking suggested that there might be "mini" black holes all around us that were created by the Big Bang. The violence of the rapid expansion following the beginning of the Universe could have squeezed concentrations of matter to form miniscule black holes, so small they can't even be seen in a regular microscope.
In 1974 he argued that due to quantum effects, black holes "evaporate" by a process now referred to as Hawking Radiation in which elementary particles (photons, electrons, quarks, gluons, etc.) are emitted. His calculations show that the smaller the size of the black hole, the faster the evaporation rate, resulting in a sudden burst of particles as the micro black hole suddenly explodes.
Some theories involving additional space dimensions predict that micro black holes could be formed at an energy as low as the TeV (trillion electron-volt) range, which are now available in the Large Hadron Collider built underground near Geneva. On 30 March 2010, the first planned collisions took place between two 3.5 TeV beams, which set a new world record for the highest-energy man-made particle collisions.
Popular concerns have been raised over end-of-the-world scenarios, but any quantum black holes created by the LHC are expected to instantly evaporate, either totally or leaving only a very weakly interacting residue.
http://www.universetoday.com/2009/05/14/...ack-holes/
http://en.wikipedia.org/wiki/Micro_black_hole
http://en.wikipedia.org/wiki/Large_Hadron_Collider