What is the size of Black hole in space?

Question

Any new details about black hole?

Answer 1

The size of a black hole depends on its mass, and the density varies *inversely* with the mass - microscopic black holes are actually more dense than larger ones.

The earth would be a black hole if it were squeezed into an extremely high-density sphere one centimeter across, for example, and the largest black hole we know of is the universe itself, which has a very low average density, but since light cannot escape from it the universe is a black hole by definition.

Answer 2

When you read about black holes, you would have read about something called the event horizon. That is the point from which light can no longer escape from the black hole. Nobody knows as to what really happens inside the event horizon. One needs to have a theory on quantum gravity to explain that. Classically, matter collapses to a point, called a singularity (infinite density), but what really happens is not known.

When astronomers refer to the "size" of the black hole, they are talking about the event horizon. The event horizon is refers to the location from the black hole where the escape velocity equals the speed of light. In other words, no particle (even light) can escape from within the event horizon.

Mathematically, the size of the black hole is given by GM/c^2 where G is the gravitational constant, M is the mass of the black hole and c is the speed of light. So, when one says that the black hole has a size of 5 km, it means that the event horizon is at a distance of 5 km from the center of the black hole. If the Sun were to become a black hole, then its size would be about 3 km.

Answer 3

If a black hole could exist a 2 solar mass black hole would have a diameter of about 3 km
The surface of a black hole is a theoretical entity.calculated to have a surface gravity such that the orbital velocity would be the speed of light.
They call it the event horizon,a membrane that would allow anything in but nothing out,not even light.
It can be supported with mathematics,which doesn't make real,but many scientists accept the black hole as a reality.
I know they sound like real neat things and they are very logical,a very deep logical analysis shows them to be non viable entities.

Answer 4

Imagine an iron ball the size of Jupiter, then condense it to the size of a pin head. The force created by the large mass condensed to such infinitesimal size, would create a black hole.

Answer 5

the black hole is is a point object. so we can't talk about it's size.

Answer 6

difficult step check out at google just that can assist

Answer 7

complex issue. browse over search engines like google. it could actually help!