2007-06-15 04:04:59 · 12 answers · asked by aung h 1 in Science & Mathematics ➔ Physics
What about it? Was there a question?
The speed of light is constant, but of course light changes direction in a gravitational field, so I suppose you would say it accelerates.
Of course if you are using the GR idea of a bent space-time, light's velocity is constant after all.
2007-06-15 04:08:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Light moves folowing the rules of a wave; However its a particle mass of very high density.
Therefore; logically it follows that ,if light is a micromass it would also obey the laws of gravity.
That means when a micromass moves radially in a gravity field it must experience increasing velocity with time. That is called acceleration.
This was proved by Einstein calculation that a light ray from star light is attracted toward the Sun causing to alter its path by at least 1.73 sec of angle.
2007-06-18 22:09:50 · answer #2 · answered by goring 6 · 0⤊ 0⤋
is wrong to think in terms of acceleration for light. Mainly
because it is massless. Light is an electromagnetic wave, and
its speed depends only on the way em fields behave in the given
medium.
2007-06-15 11:12:45 · answer #3 · answered by sparks9653 6 · 0⤊ 0⤋
The current thinking is that light, once emitted, moves at a constant speed.
2007-06-16 15:33:49 · answer #4 · answered by Fred 7 · 0⤊ 0⤋
While an observer accelerates toward receding objects, they can move away faster than the speed of light.
2007-06-15 11:26:39 · answer #5 · answered by Jon 3 · 0⤊ 0⤋
The speed of light is constant, but it can vary according to gravity or according to the medium in which it is traveling.
For example, light travels more slowly in water than in a vacuum, for example. It would certainly be possible to measure the acceleration of light as it leaves the water. (These kids managed to do it - http://www.ms.uky.edu/~skim/SpeedOfLight/)
2007-06-15 11:11:09 · answer #6 · answered by bonshui 6 · 0⤊ 1⤋
There is none, light leaves it's source at the speed of light.
2007-06-18 18:07:45 · answer #7 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Instantainious. It is ether on or off as far as the velocity is concerned. It is always going at the smae speed.
2007-06-15 11:09:36 · answer #8 · answered by eric l 6 · 0⤊ 0⤋
Light is a constant speed. There is no acceleration.
2007-06-15 11:07:29 · answer #9 · answered by yeeeehaw 5 · 0⤊ 0⤋
Ahhh soo...rots a ruck wit dat!
2007-06-15 11:07:49 · answer #10 · answered by Anonymous · 0⤊ 0⤋