2007-03-19 06:06:32 · 21 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
It hasn't got any speed as it doesn't travel anywhere. Darkness is merely a lack of light and it is the light that has moved.I believe light travels at something like 180000miles per second per second.
2007-03-19 06:11:38 · answer #1 · answered by Anonymous · 3⤊ 0⤋
A shadow is the absence of light which is dark.
Nothing can exceed the speed of light ,but by the use of parallax,you may be able to cause a shadow to move across a surface faster than the speed of light.
A shadow is not an incident or a physical event,no matter or even light is involved so the speed of dark could exceed the speed of light without violating the principal that restricts the speed of light.
2007-03-19 17:47:08 · answer #2 · answered by Billy Butthead 7 · 0⤊ 0⤋
Since the scientific definition of darkness is the absence of light, and since the speed of light cannot overtake darkness, there are two plausible answers: one is that it has no speed at all, and the other is that its speed is greater than that of the speed of light, or c+n or zero, but nothing in between.
2007-03-19 13:15:24 · answer #3 · answered by Robert G 5 · 1⤊ 0⤋
Dark doesn't have a measurement of speed as dark/shadow is created where light cannot reach therefore it it is instant and doesn't take time to travel (speed)
2007-03-20 14:07:06 · answer #4 · answered by magicmo10 2 · 0⤊ 0⤋
Dark, the absence of light, therefore dark is like a stagnant river, it doesn't move. Whereas light relies on photons to measure speed, dark has no physical features, so what are you measuring the speed of?
2007-03-19 13:46:43 · answer #5 · answered by Think Tank 6 · 2⤊ 0⤋
Dark doesnt have a speed. It is not like light. There is no such thing as the speed of dark.
2007-03-19 15:48:49 · answer #6 · answered by DJIAE 1 · 1⤊ 0⤋
Light is only something because it is a form of energy, dark is nothing so it has no speed.
2007-03-19 15:11:20 · answer #7 · answered by Anonymon 4 · 1⤊ 0⤋
In research due to be fully published in spring 2006, researchers from the University of Cambridge Institute of Astronomy claim to have calculated that dark matter only comes in clumps larger than about 1,000 light-years across, implying an average speed of dark matter particles of 9 km/s, a density of 20 amu/cm³, and temperature of 10,000 kelvins.[16]
2007-03-19 13:21:11 · answer #8 · answered by Eric R 6 · 1⤊ 1⤋
Dark isnt really anything but the absence of light, so the same as the speed of light.
2007-03-20 11:09:49 · answer #9 · answered by xooxcable 5 · 0⤊ 1⤋
Since dark occurs when there is no light, the same as the speed of light as, abstractly, light moves at the same rate as the last photon of light.
2007-03-19 13:10:00 · answer #10 · answered by Tim 4 · 1⤊ 0⤋