You have to exceed gravitational force to achieve escape velocity. So, if even light cannot escape it in a black hole, then the inward force of gravity must, surely, accelerate things faster han light?!!
2006-08-01 21:21:11 · 10 answers · asked by pyronaught2000 2 in Science & Mathematics ➔ Astronomy & Space
No. Escape velocity is the velocity at which an unpropelled object can overcome the gravitational pull of an object, but if it fails to achieve escape velocity it either simply falls back or ends up in a decaying orbit.
Ignoring energy loss, if you fire something up off the surface of a planet, for example, then the kinetic energy is converted to potential energy as it gets higher, it slows down, eventually stops, and starts falling, reconverting the potential energy to kinetic energy, and ultimately (remembering that this ignores energy loss) hits the ground at the same speed as it originally left. It cannot gain more energy than it started with, so it cannot attain a higher speed.
For example, the escape velocity at the surface of the earth is about 11.2 km/sec. If you were able to shoot something up in the air at 10 km/sec, it would not achieve escape, but clearly it would also not return to earth at 11.2 km/sec - how could it, since where would the extra energy come from?
Same principle for black holes - it can't speed things up, so light trying to escape gets slowed down.
This only leaves the "problem" of objects which were already travelling at light speed towards the black hole when they entered the gravitational field. I think I'll leave that to a real physicist to explain ;-)
2006-08-01 21:58:39 · answer #1 · answered by Graham I 6 · 4⤊ 0⤋
No. Although a particle may closely approximate the speed of light as it spirals into one. That is the current belief Interestingly, only a week ago, a science news story announced that some physicists are exploring the idea that light may not have a constant speed over time, and this was derived from studies of stars at very great distances approching the limits of our universe.
Back to your question. At the event horizon--the precise point of no return and the actual edge of a blackhole, the particle would slow to an apparent stop--as bizzare as that may seem, and according to Hawkings. Go figure! Only recently have we obtained any kind of evidence for black holes actually existing, anyhow. AND NO ONE KNOWS what happens inside one--if there IS an inside.
2006-08-02 04:30:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Light speed is a measure of the speed of light and this in itself is the distance over the time, current theory suggests that once you've enetered the event horizom of a black hole i.e crossed it's border so to speak - time as we know it stops, distance become immesurable, as the curvature of space( distance ) and time causes the hole to bend and warp in on itself. Light cannot escape a black hole this means that if you were to shine a torch into a black hole it would seem to disappear into the darkness at the event horizon - The thing about a black hole is that it's a collapsed sun, that has imploded in on itself and it's gravitational pull has become bigger and bigger as it's size and shape get smaller and smaller thus making it an infinte mass in a smaller and smaller body, this causes it's graviational force to become so large that not even light can escape it pull - hmmmnnnnn
2006-08-02 05:08:25 · answer #3 · answered by Seely 2 · 0⤊ 0⤋
i'm half way through a black hole, it's dark and i'm wearing sunglasses, i'm on a mission from god if all goes well i should be going back in time where the light is brighter than ever and the dark has more depth. light and dark have to co-exist, does the fire not need water? my question is this... if time slows down the closer you get to light speed, if you were to exeed light speed through entering a black hole could you turn back time to before you went into the black hole, if so would you meet yourself before you got there? quantum physics is like being a student of zen.
2006-08-02 05:06:21 · answer #4 · answered by KU 4 · 0⤊ 0⤋
light cant escape from a black hole so nothing else can escape a black hole. nothing at all can escape a black hole. Light is still the fastest.
2006-08-02 04:31:53 · answer #5 · answered by Blah 2 · 0⤊ 0⤋
I remember reading an article where they said that black-holes had been detected by the gamma radiation radiating away from them ! So it seems maybe things can escape a blackhole after all !
2006-08-02 08:15:32 · answer #6 · answered by Timbo 3 · 0⤊ 0⤋
if the speed of light is 186,282.397 miles per second surely the speed of black must be faster to suck in light?
2006-08-02 08:50:13 · answer #7 · answered by jamespurves_uk 1 · 0⤊ 0⤋
actually, particles CAN exceed the speed of light...
remember the Uncertainity Principle?
2006-08-02 04:36:34 · answer #8 · answered by happy_84 k 4 · 0⤊ 0⤋
No one actually knows what a black hole is.
2006-08-02 04:31:36 · answer #9 · answered by wd20x2 3 · 0⤊ 0⤋
no its the mass of light that gets draged in
2006-08-03 05:05:39 · answer #10 · answered by chris wick 3 · 0⤊ 0⤋