2007-02-02 12:21:16 · 24 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
It is actually colourless as even light cannot escape it so it cannot reflect light, which we need to determine the colour of anything, hence the appearance of it looking black.
2007-02-02 12:28:20 · answer #1 · answered by Anonymous · 1⤊ 1⤋
OK, Brian, grab something to drink, get comfortable.
Black holes are not black. They are visible. Here's why.
One way of conceiving of the motion of a light ray through space is the constant creation and destruction of a pair of what are called virtual particles. These two particles form in a short enough time and a small enough space that they do not violate the Heisenberg uncertainty Principle. Now, it just may happen that a light ray "grazes" the event horizon of a black hole, and one of the virtual particle is created inside the event horizon. This pushes to other particle into reality so to speak and it leaves the vicinity of the event horizon. Thus, black holes "glow." The larger they are the lower the energy of the created particle. This actually has to do with the curvature of the geometry near the event horizon. Small black hole are thought to glow brightly.
As the black hole ingests the virtual particle is shrinks slightly in size as a consequence of the preservation of mass/energy. A new particle was created outside the event horizon, so the hole must shrink to compensate. At the end of their "life" black holes are thought to go out is a blaze of gamma radiation.
It was Stephen Hawking who discovered this effect, and the radiation is named for him: Hawking Radiation.
So, they are not black, and the smaller they are the brighter they are.
HTH
Charles
2007-02-02 21:43:09 · answer #2 · answered by Charles 6 · 1⤊ 0⤋
A black hole has no colour. It's usually formed by a star which has come to the end of it's life, gone nova and then imploded to form a very dense, very small object with a massive gravitational field. this field will suck in anything it comes in contact with, ripping them apart atom by atom before they reach the object; even other stars aren't immune to this. Nothing, not even light can escape so it's the absense of light that gives a black hole it's name.
2007-02-03 13:16:39 · answer #3 · answered by elflaeda 7 · 0⤊ 0⤋
To tell you the truth, I don't think a black hole has any color, but black. After a huge star explodes (a explosion of a huge star is called a supernova), it runs out of energy and becomes a black hole, which sucks, or "spaghetti-fies" anything that comes near it. FYI to spaghetti-fy something means to stretch something out, like a spaghetti.
I would be happy to help with any other problems that can be answered by an (8th, 9th etc.) grader! :-)
2007-02-02 20:29:49 · answer #4 · answered by zswrs1 3 · 2⤊ 0⤋
A black hole has no colour beyond the matter it sucks in, unless it's an inverted star, in which case, it is impossible to know as the gravitational centre is in an unseen realm of physics. Hmm, a line of bs :D
2007-02-03 06:53:22 · answer #5 · answered by bavwill 3 · 0⤊ 1⤋
It may be bright green with yellow dots and pink stripes. But since no light can escape from a black hole because of its immense gravity, it is to all intents and purposes, BLACK!
2007-02-05 17:45:17 · answer #6 · answered by Anonymous · 0⤊ 0⤋
No light whatsoever can leave a black hole, including any light it generates or reflects into space. Therefore it would be invisible.
2007-02-02 20:32:00 · answer #7 · answered by Chug-a-Lug 7 · 0⤊ 0⤋
If a black hole could exist,the quantum effect would cause it to glow dimly in white light.
2007-02-03 11:15:22 · answer #8 · answered by Billy Butthead 7 · 0⤊ 0⤋
Green
2007-02-02 20:28:12 · answer #9 · answered by Pauline 5 · 0⤊ 0⤋
black holes are an unknown.they think they are worm like holes that take you into another dimenstion.
they look anything but black.
2007-02-03 08:26:55 · answer #10 · answered by phelps 3 · 0⤊ 1⤋