Question about gravitatinal singularities and Shwarzchilds Radius.

[zeromodz]

Every mass has a Shwarzchild's radius. Once the mass is compressed down to its Shwarzchild's radius, does it necessarily turn into a gravitational singularity, or does it just trap light from leaving?

In other words, do all black holes have a gravitational singularity? and do all black holes violate the pauli exclusion principle?

And what magnitudes of forces are needed to actually squeeze matter together to an infinite density violating the pauli exclusion principle?

Sorry for lots of questions, I am just dying to know.

 

[Valerie Park]

No, not all masses that reach their Schwarzschild's radius necessarily turn into a gravitational singularity. Depending on the nature of the matter, and the amount of pressure on it, it may remain in a super-dense state without forming a singularity. However, when this happens, the matter will trap light from leaving, and the object will still be considered a black hole. In general, all black holes do have a gravitational singularity, as this is the defining characteristic of a black hole. However, there are cases where the matter is so dense that a singularity has not yet formed, but the object is still considered a black hole. The magnitude of forces needed to squeeze matter together to an infinite density and violate the Pauli exclusion principle would depend on the type of matter and its composition. Generally speaking, extremely large amounts of pressure and energy would be required in order to compress matter to such extreme densities.