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Post By
rc

In Reply To
Beowulf

Subj: Re: On The Event Horizon.....
Posted: Sat Sep 13, 2008 at 11:28:27 am EDT (Viewed 154 times)
Reply Subj: Re: On The Event Horizon.....
Posted: Sat Sep 13, 2008 at 11:09:21 am EDT


> Well, it was about micro Black Holes, not the big brothers .

The micro hole was in the JLA "Mnemon" issue, not the one that Supes and Doomsday crossed over, or the Cyborg issue, etc.

> The more powerful a Black Hole actually is, the easier it would be to survive behind the Event Horizon, because it would be a much larger area. You just wouldn't come back from there, if you weren't wearing a cape or working for Galactus.

Whatever the size, all black holes' event horizons are so powerful that not even light can escape them: The power of holes' external gravitation fields, i.e., the fields outside their event horizons, varies -- as does the radii of their event horizons -- according to mass, but not the power of their event horizons. Their power is all the same.

Pull of an Event Horizon
"The defining feature of a black hole, the event horizon, is a surface in spacetime that marks a point of no return. Once an object has crossed this surface there is no way that it can return to the other side. Consequently, anything inside this surface is completely hidden from observers outside. Other than this the event horizon is a completely normal part of space, with no special features that would allow someone falling into the a black hole to know when he would cross the horizon. The event horizon is not a solid surface, and does not obstruct or slow down matter or radiation that is traveling towards the region within the event horizon.

Outside of the event horizon, the gravitational field is identical to the field produced by any other spherically symmetric object of the same mass. The popular conception of black holes as 'sucking' things in is false: objects can maintain an orbit around black holes indefinitely, provided they stay outside the photon sphere (described below), and also ignoring the effects of gravitational radiation, which causes orbiting objects to lose energy, similar to the effect of electromagnetic radiation."

Regarding the range of an event horizon, it "is determined by Schwarzschild radius," which "is proportional to [the hole's] mass."

Also, every singularity is infinitely dense and has infinitely strong gravity.

Density and Gravity of a Singularity
"At the center of a black hole lies the singularity, where matter is crushed to infinite density, the pull of gravity is infinitely strong, and spacetime has infinite curvature. Here it's no longer meaningful to speak of space and time, much less spacetime. Jumbled up at the singularity, space and time cease to exist as we know them."

_rc


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