does the photon accelerate? If a photon can't escape a black hole does that same gravity accelerate the photon past the speed of light once it passes the event horizon? Assuming the photon was heading directly into the center of the black hole of course.
2007-02-27 08:26:30 · 7 answers · asked by whoisit13579 1 in Science & Mathematics ➔ Physics
No, the photon does not accelerate. But, it has more energy so it goes from visible up to x-rays.Also, once it passes the event horizon, no one really knows what happens because the laws of physics break down.
2007-02-27 08:36:01 · answer #1 · answered by David V 5 · 0⤊ 0⤋
Light from a Black Hole:
One of their basic properties of black holes is that they trap light. According to the special theory of relativity (and also according to the general theory since it contains the special theory) that nothing exceeds the speed of light.
The particles of light, called the photons lose energy when travelling out of a gravitational field and appear to be redder to an external observer. . The stronger the gravitational field, the more energy the photons lose because of this gravitational redshift. The extreme case is a black hole where photons from within a certain radius lose all their energy and become invisible.
Another view of the same phenomenon is that the light can not escape out of a black hole as it can not go pass the event horizon. The event horizon is the point outside the black hole where the gravitational attraction becomes so strong that the escape velocity (the velocity at which an object would have to go to escape the gravitational field) equals the speed of light. Since according to the relativity theory no object can exceed the speed of light that means nothing, not even light, could escape the black hole once it is inside this distance from the center of the black hole.
A more fundamental way of viewing this (the same phenomenon) is that in a black hole, the gravitational field is so intense that it bends space and time around itself so that inside the event horizon there are literally no paths in space and time that lead to the outside of the black hole: No matter what direction you went, you would find that your path led back to the center of the black hole, where the singularity is found.
"does the photon accelerate? If a photon can't escape a black hole does that same gravity accelerate the photon past the speed of light once it passes the event horizon? Assuming the photon was heading directly into the center of the black hole of course."
--- No. The photon moves at the same speed c in a local inertial frame. It does not get accelerated.
2007-02-27 08:36:09 · answer #2 · answered by Dalilur R 3 · 0⤊ 0⤋
According to theory - light is always traveling at the speed of light regardless of your reference frame. In other words if you shine a flashlight at someone coming toward you at the 1/2 the speed of light, both of you will see the beam traveling at the speed of light. What will change is the frequency of the light. For the guy coming toward you, your "red" light will look "blue".
So the light entering a black hole will change frequency, not speed. I think it gains energy so it would shift toward X-Rays, etc, but I am not sure about this last part.
2007-02-27 08:34:01 · answer #3 · answered by rscanner 6 · 0⤊ 0⤋
no one be responsive to what occurs as quickly as you flow the form horizon of a black hollow (that's the place no easy or the rest can get away from the black hollow). this is achieveable which you would be traveling quicker than velocity of sunshine, which additionally potential which you're additionally traveling backwards in time. sure, you are able to no longer trip quicker than easy once you're exterior the form horizon. yet presently there is actual concept to describe what occurs in the form horizon. as a count of actuality, specific and primary Relativity tells us that on the form horizon time looks to provide up.
2016-10-02 02:10:29 · answer #4 · answered by Anonymous · 0⤊ 0⤋
First, like this guy said c is law.
Also, who knows what happens behind the event horizon?
This is one of those Stephan Hawking questions.
2007-02-27 08:33:29 · answer #5 · answered by honor roller 2 · 0⤊ 0⤋
Until it hits the singularity, it could not exceed c. Once it hits the singularity, the laws of physics may not apply.
2007-02-27 08:34:32 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Maybe its speed would remain the same, but time around it would slow, so its relative speed would be faster.
2007-02-27 08:35:59 · answer #7 · answered by ryushinigami 3 · 0⤊ 0⤋