Is a black hole just the singularity?

In the real universe, no black holes contain singularities. A singularity is a point in space where there is a mass with infinite density. This would lead to a spacetime with an infinite curvature.

Does kugelblitz exist?

A kugelblitz is defined as a black hole created from energy with no matter. The usual idea is to focus enough light into a region smaller than the event horizon of the desired black hole. No, they can be created only in science fiction.

What is at the singularity of a black hole?

The singularity at the center of a black hole is the ultimate no man’s land: a place where matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down. And it doesn’t really exist.

Is a black hole a graviton?

In this sense the black hole is a kind of “frozen star”: the gravitational field is a fossil field. If things like gravity correspond to the exchange of “particles” like gravitons, how can they get out of the event horizon to do their job? Gravitons don’t exist in general relativity, because GR is not a quantum theory.

What is the difference between a singularity and a black hole?

The singularity is the centre of a black hole. A black hole by definition is a region of space with a very strong gravitational field where even light cannot escape past a certain point, called the event horizon or “the point of no return.”

How dense is a black hole singularity?

The density at the center of a black hole is infinite (it’s a famous “singularity”, which leads to difficulties in modern cosmology).

Does a kugelblitz have mass?

German for “ball lightning,” a kugelblitz is a black hole made from light rather than matter. Although light has no mass, it does have energy.

Does time exist in a singularity?

Singularities are where the law of gravitation governing the Universe — Einstein’s General Relativity — yields nonsense for predictions. Relativity, remember, is the theory that describes space and time. But at singularities, both spatial and temporal dimensions cease to exist.

Why can gravity escape a black hole but not light?

To escape from within a black hole requires faster than light speeds – so where does that leave gravity? To escape from within a black hole requires faster than light speeds, but according to Einstein’s theory of gravity, General Relativity, gravity is the distortion of space and time caused by the presence of mass.

Can gravity escape a black hole?

Electromagnetic radiation cannot escape a black hole, because it travels at the speed of light. Similarly, gravitational radiation cannot escape a black hole either, because it too travels at the speed of light.

Is a kugelblitz a black hole?

To answer the question; no, a Kugelblitz is a black hole. Technically, a black hole and its singularity aren’t really terms you can separate and say “that is a black hole and that is its singularity”.

What is the singularity of a black hole?

Technically, a black hole and its singularity aren’t really terms you can separate and say “that is a black hole and that is its singularity”. A black hole is a singularity that condenses matter, or more accurate: energy in a relativistic sense, in an infinitely small space.

What breaks down spacetime singularities?

When it is the fundamental geometry that breaks down, spacetime singularities are often viewed as an end, or “edge”, of spacetime itself. Numerous difficulties, however, arise when one tries to make this notion more precise. Breakdowns in other physical structures pose other problems, just as difficult.

Is there such thing as a singularity?

General relativity, Einstein’s theory of space, time, and gravity, allows for the existence of singularities. On this nearly all agree. However, when it comes to the question of how, precisely, singularities are to be defined, there is widespread disagreement.