Tuesday, 24 July 2012

Black Holes Pt.2

What happens near and inside a Black-Hole?

When placed near a black hole, time seems to exhibit a different reality, when an observer looks at the subject near the hole, time slows down, clocks and other time keeping devices slow down drastically relative to the distant observer, who is further away from the black hole. This is known as “gravitational time dilation”. Matter and waves slow downs as it reaches the event horizon, thus assuming it will take an infinite time to actually reach it.

During this process the object that is slowing down, light is emitted to appear a dimmer red, this is known as the “gravitational red shift effect”. Actually even before the mass reaches the event horizon, it will be so dim that light will no longer bounce of it, making it disappear almost and thus can no longer be seen. But to the matter that is caught by the holes gravity, it will not notice this and think time is finite.

Fig. 1This is picture of a Black Hole emanating X-Ray radiation from many Black Holes. They were previously thought to be too old and decrepit to release X-Ray Radiation. This was discovered using the Chandra X-Ray Observatory.

Credit: NASA/CXC/OCIW/P. Martini et al

Core of Darkness

The core of the dark hole, is a region of space inside the black hole where the space-time curvature is infinite. The singular region actually has zero volume and which the singular region has the mass of the black holes “solution”. Making this singular region having infinite density.
With simple black-holes, any one of the thing that passes the even horizon, will be sucked into the singularity, no exceptions. Crushing them into an infinite density, then “contributing” their mass to the total sum of mass of the singularity. But this would not be felt if this was a person. As the person would already be dead by the immense tidal forces that are made by the black hole, but a process called spaghettification or to others, the “noodle effect” would break down the person or thing atom by atom at nearly the speed of light.

The Worm Hole Theory

With a charged or rotating black hole, it is theoretically possible to actually exit a black hole, how ever unlikely It is to actually happen (Even if you get past the fact you can't actually see it and you traveled far enough to reach one). You are able to exit the hole into a different space-time region, making the black hole a portal or worm hole. Though there is more advanced concepts to explain this phenomenon (Will cover later).

One major issue with the singularities, is the fact that all of known physics and mathematics breaks down. Not being able to properly quantify the characteristics of a black-hole.

Black-holes actually evaporate leaving behind the emittance of Hawkins radiation. This radiation does not give away any information about the core of the singularity.

End of Part 2



  • Anonymous says:
    2 October 2012 at 20:32

    I thought that supermassive black holes could have very low density, even lower than water. How does the mass has to do with that?

  • Feynman says:
    4 October 2012 at 01:03

    Well that is because the Schwarzschild radius is directly proportional to the Black Holes mass, and also the density of the Black Hole is inversely proportional to its volume also.

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