What is so special about blackholes that most of the laws of physics break down when particles enter it?

Question

Please help me visualise how a log of wood will look like after it is fed to a black hole. How far away from earth is the nearest blackhole and what is it's name [if anyone has cared to give it one].

Answer 1

A black hole is an object predicted by general relativity,with a gravitational field so powerful that even electromagnetic radiation (such as light) cannot escape its pull.

A black hole is defined to be a region of space-time where escape to the outside universe is impossible. The outer boundary of this region is called the event horizon. Nothing can move from inside the event horizon to the outside, even briefly, due to the extreme gravitational field existing within the region. For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. Within the black hole is a singularity, an anomalous place where matter is compressed to the degree that the known laws of physics no longer apply to it.

Theoretically, a black hole can be of any size. Astrophysicists expect to find black holes with masses ranging between roughly the mass of the Sun ("stellar-mass" black holes) to many millions of times the mass of the Sun (supermassive black holes).

The existence of black holes in the universe is well supported by astronomical observation, particularly from studying X-ray emission from X-ray binaries and active galactic nuclei. It has also been hypothesized that black holes radiate an undetectably small amount of energy due to quantum mechanical effects. This is called Hawking radiation.

Answer 2

Blackhole is formed due to blusting of a star.During blusting the coar area of the star confess a high pressure from it's arround and it become so & so dense. It's density becomes as the neucleous of a molicule.This concentrated material contain huge mass in a very small space resulting a very very high gravity.This is called point of concentration or point of singularity.
Several gases exist in earth atm. but does not exist in moon atm. because the speed of the gas atoms can not overcome the gravitational pool of the Earth (i.e. the escape velosity which is 11.2 km/sec. > the velosity of the gas molicules) but can ignore the gravitational pool of the Moon which ts 1/6th (Escape velosity also) of the Earth.
The gravity of a blackhole is so high that, even the velosity of light can not overcome the escape valosity of the blackhole and so light can not come out from the blackhole and so it's existance also cannot be identified by light(as for planets or stars) and is called blackhole .
The blackhole is identified by the cosmic rays with velosity greater than light.
The black hole is considered as the initiation of a star .A new star is borned by the explotion oh a black hole. This is also a cyclic process like other processes. But a star does not always undergoes to a black hole .At first after being destroyed a star becomes a red gient(expans and becoms very big and red) or a white dwarf depending upon it's several atom concentration ratio.The laws of physics are not break down here but inform us about the anastomosing effects and limitation of the laws.In the blackhole any matter doesnot exist with it's property. Here all the matter behabe as the neucleous of an atom i.e. any matter doesnot appear in atomoc or molicular stage but as atom neucleous due to very very high concentration resulting very high gravitational pull resulting very very high escape velosity ,all of which follow the laws of physics.
Most of these are assumption and I also may be wrong. If so plz help me.

Answer 3

Well dear you have a GOOD ques. . Let me try it out:
1. A black hole : I can be defined as a superconcentrated collapsed star with its escape velocity greater than the speed if light ( >299000000 m/s ). So even light can't escape and hence its called a blck hole.
2. Coming to your ques. A black hole has been earmarked by , specially, the particle physicsts as a region where the general laws of physics ( which hold true in our universe ) are defied. The reason which can be attributed to this effect is the distinct nature of the space-time which prevails around it.
3. Our Human genious Einstein suggested the concept of these Black Holes the very 1st time. He, referring to his General Theory Of relativity, proposed that the Space-time near a black-hole simply collapses to the Infinity. Today, the physicists call it something like : SINGULARITY. Here the density of matter is infinite and so is the temperature. Again, the fundamental particles ( as we know today ) simply disintegrate to quantas.
4. This world of black holes remained static since 1920 ( after Einstein's Relativity ), until another breakthrough occured with Sir STEPHEN WILLIAM HAWKING's concept of "evaporating Black-Holes". (To Know more you may refer to his bestseller " A brief History Of Time).

Thus, its evident that in a black hole 1. Qauntum Mechanics and Relativity both are partially correct. they need an alliance. 2. The laws of physics we observe around us, are violated ( as matter there is not the way what we have on our planet ).

Next part of Ques.
Yes Its proposed that the center of our milkyway Galaxy has a Giant BlackHole which is responsible for maintaining the integrity of the Galaxy with its Gravitational attraction. Evidences to this are:
1. Radio Astronomy; Infrared Astronomy; X-Ray Astronomy studies indicate compact objects near the galactic center, probably a massive black hole.
2.Observations of stars racing around the center also suggest the presence of a black hole. The stars orbit at speeds up to 1.8 million km/h (1.1 million mph)—17 times the speed at which Earth circles the Sun—even though they are hundreds of times farther from the center than Earth is from the Sun.

Whatever lies at the center of the galaxy must have a tremendous amount of mass packed into a relatively small area in order to cause these stars to orbit so quickly at such a distance. The most likely candidate is a black hole.


Bye....

Answer 4

Some scientists have said that one day black holes will enable space travel through long distances. Every tornado or vacumn has two ends. All you would have to do is make a space ship that was tough enough to stand moving at these speeds. Then go into a black hole and come out the other end. It would suck you in at tremendous speeds. Say an unmanned ship that you could track where it would come out at. Maybe a planet that could be colonized. Maybe to a firey end. But once it was descerned what would happen then it could be used to our knowledge of the Universe. How to get from point A to point B. It has been termed a giant vacumn.
a log of wood would burn up because of the speeds of travel.
Like falling into our apmosphere. Unless you know the window of where to fall and how to regulate it. Space travel is a lot of where, when and how to.

Answer 5

To correct Tony, a log of wood wouldn't burn out in a black
hole because of the speed. The log would burn out in Earth if it fell through the atmosphere because of the incredible amount of friction created by air particles hitting the log at high speeds. Friction generates heat, which burns up the wood. There is no atmosphere (that we know of) in a black hole, and no air particles to create friction to burn it up.
Cheers!

Answer 6

There nothing about black holes that make the laws of physics "break down". BHs are part of the real universe, so whatever happens inside them is real. Everything that is real follows the laws of physics.

What breaks down, is our UNDERSTANDING of the laws. We just don't know what really happens deep inside a black hole.

If something like a log of wood got close to a BH, it would be ripped to shreds. Then the shreds would be broken into atoms. Then the atoms would be separated into protons and neutrons and electrons. And that's all miles and miles before it got to the center of the BH. After that, well, that's where our understanding stops.

Answer 7

A black hole is a theoretical entity.
As the surface gravity of a body increases it's surface orbital velocity increases.
It the surface gravity is such that the speed of light is required to escape the surface the body is said to be a black hole.
If a black hole could exist a log falling through it's event horizon would be mangled to a quantum state then confined to a singularity at it's centre.
The nearest black hole is said to be at the centre of our galaxy
No proof exists to substantiate the existence of a black hole.
There are many good reasons to believe that a black hole cannot exist.

Answer 8

Special about Black holes is its gravitational force. it is so high that even light rays can not escape its gravitation. Hence you can not even imagine feeding a log. Since light rays does not emit from black holes, no body can see it. Presence of black holes are presently identified on hypothesis. and by observing sudden disappearance of some stellar objects, as observed from most sophisticated telescopes.

Answer 9

I keep hearing top Physicists say that things entering black holes get "spaghettified," meaning that the log of wood would look like a very very long string of wooden spaghetti. In fact, even the individual atoms in it would be pulled long.

Answer 10

blackhole is a very strong object formed from a dead star.. it is so strong that it can even bend light into it.. anything that come closer to it wll be vanished forever..