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The term microscopic black holes usually appears in context of the big bang, since they may have been created by conditions in the early universe. Since it implies microscopic, an easy answer would be that their size is "smaller than would be visible". One important fact about black holes to remember is that they could potentially have any radius - there is no lower limit to this, all the way down to approaching zero. This is because the radius of a black hole is a direct function of their mass. The Schwarzschild radius of a black hole is simply twice the gravitational constant times the mass, divided by the square of the speed of light. If an object has a radius smaller than its own Schwarzschild or gravitational radius, it is a black hole; if it is larger, then it is not, so in this sense their existence is defined by their density. The Earth has a gravitational radius that would make it about the size of a marble; the Sun's is about 3km.
The reason for the scant evidence of microcopic black holes might relate to the mechanisms by which black holes are created. The most common mechanism is believed to be associated with stellar evolution wherein, at the end of a star's life when it has exhausted its fuel and can no longer resist the inward pull of its own gravity, it will collapse; but the mass required to do this would not create a microscopic one. Whether the big bang created any microscopic black holes is still a subject of research; other microscopic ones may come into existence in association with collisions of extremely powerful cosmic rays.
One factor working against the existence of microscopic black holes is Hawking radiation, a mechanism by which they can lose mass and "evaporate". Although Hawking radiation is weak, the intensity of the radiation is inversely proportional to their size - so microscopic black holes are expected to be short-lived.
What else can I help you with?
Will micro black holes always evaporate?
Most micro black holes are predicted to evaporate through Hawking radiation, a process where they lose mass over time. The smaller the black hole, the faster it will evaporate. However, there are still uncertainties surrounding the exact mechanisms of black hole evaporation.
What was initially inside the big black barrel?
After a black hole
Is the black hole big?
Well if your comparing the smallest black hole knowen to humans to the Earth YES THEY ARE BIG but there is no definant diameter or size considering that all black holes are unique in all three size diameter and gravataional pull.
Where is the big hole in lacunosa town in Pokemon black?
In Pokemon Black, the big hole in Lacunosa Town can be found at the north exit of the town, near the entrance of Route 12. It serves as the entrance to the Giant Chasm, a significant area in the game.
What is bigbang and black hole?
Big Bang: When space started. Gas, dust and rock particles explode from it and eventually forms celestial bodies. Black Hole: When a star dies or loses its brightness, develops into a dead star or a black hole.
Can a black hole destory the galaxy?
No. No black hole is big enough to do that.
Can your universe just be at the end of a black hole and can the big bang just be the birth of that black hole?
Actually one interpretation of the big bang is as a white hole, the inverse of a black hole.
Will a black hole destrow earth?
A black hole can,but it is very rare for a black hole big enough to swallow Earth.
What happened when two black hole met?
both of the black hole will join together as one big black hole. they can either have a direct hit or both spin, twirling into each other until it create a new super big black hole.
What is M in MBH?
Perhaps this stands for Micro Black Hole, a theoretical concept yet to be proved.
Will micro black holes always evaporate?
Most micro black holes are predicted to evaporate through Hawking radiation, a process where they lose mass over time. The smaller the black hole, the faster it will evaporate. However, there are still uncertainties surrounding the exact mechanisms of black hole evaporation.
Was the big bang a black hole?
No. The Big Bang was an event, not a material thing. (There are plenty of other ways in which it is utterly unlike a black hole as well.)
Will the big bang make a black hole?
no black holes are stars
First black hole?
scientists think that the Big Bang which generated the univerese waas the consequence of the explosion of a massive black hole. so the big bang
Is there a black hole on the Earth?
It's highly unlikely, as we would have detected it. Micro black holes are physically possible but their existence hasn't been confirmed. One could safely say, that there is no black hole on the Earth and the nearest black hole is a safe, 1,600 light years from us.
Is the black hole gone came in 2012?
NO BIG NO
How big is a mini black hole?
This is by RaJ bHANDAL
