2006-10-29 15:17:38 · 13 answers · asked by darkangelinslc 1 in Science & Mathematics ➔ Physics
Light travels at 299,792.458 Kilometers per second or 186,282.4 miles per second.
As in art, you need darkness to show light, hence in order to calculate the velocity of light, you need darkness to compare it to.
Since darkness is the absence of light, darkness has no speed it only exists, only light has velocity.
Dark matter in the universe does not move therefore it has no velocity.
Something in the darkness however does move. Gravity. Darkness appears to move because it has dense pockets of gravity but, only to create a more dense area. An area moves (is pulled by gravity) toward another area until another area that has a stronger gravitational pull, pulls it off its course.
Sort of like a magnet attracting a steel ball. Either the larger magnet or the closer magnet will attract the most. You can't see magnetic waves but, you know they're there by virtue of the steel ball moving. However magnetic waves don't move they only vary in intensities.
These areas revolve around and interact with each other and other planetary bodies (ie. our sun and solar system, other stars and even other galaxies, creating and recreating pockets of varying intensities of gravity but, darkness doesn't move, so it has no velocity.
Neither does the darkness in your bedroom. It's just dark. No movement. Until light speeds from the light bulb replacing darkness. The darkness is still there.
You can't prove white light is made up of all colors until you split it with a prism. So light is ALL colors. Darkness is the absence of color. White light can be made by combining red green and blue lights like from the electron gun used to make images in your television set.
Can't see magnetism but you can see iron filings react to it's presence.
Darkness doesn't have velocity.
2006-10-29 16:10:12 · answer #1 · answered by pjnickles 2 · 0⤊ 0⤋
Darkness is in reality the absence of light. Light we can study, but not darkness. In fact we can use Newton's prism to break white light into many colors and study the various wavelengths of each color. You cannot measure darkness. A simple ray of light can break into a world of darkness and illuminate it. How can you know how dark a certain space is? You measure the amount of light present. Isn't this correct? Darkness is a term used by man to describe what happens when there is no light present." This quote is attributed to Albert Einstein, however it is actually a hoax. The point is made, however that darkness doesn't really exist - it is just the absence of light. so to answer your question. I guess the speed of dark would be -186,000 feet per second ... the opposite of the speed of light..........or not.........
2006-10-29 15:25:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
First you must come up with a usable definition of dark.
Does "the absence of light" work?
What is the speed of the absence of light?
If you cannot give a good definition, then at least describe an experiment of the phenomenon you want to measure.
Perhaps: a room is sealed such that it is completely opaque to all outside light sources. there is a light source on in the room. the light is turned off. how long does it take for the room to become completely dark?
But here again, you still need to define dark. Do you mean no visible light?
You really need to define the question more precisely.
2006-10-29 15:33:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Hi. In the absence of light, dark prevails. In the presence of light, light prevails. Assume you have a dark (non illuminated) space. You introduce light which spreads at 'c'. You stop the light. The darkness (non-illuminated area/volume) spreads at 'c' also. Darkness at the speed of light. No other answer makes sense.
2006-10-29 15:27:08 · answer #4 · answered by Cirric 7 · 0⤊ 0⤋
Shadows can certainly move faster then the speed of light; however, there is nothing too amazing about this because no information or energy can be conveyed by shadow. I am not sure how hast a shadow can move, but I suspect a great deal faster then the speed of light.
2006-10-29 15:20:59 · answer #5 · answered by bruinfan 7 · 0⤊ 0⤋
Darkness is no more a quantity than silence is. They are both defined by the absence of another quality, namely, light and sound respectively. The speed of light is 9e8 m/sec. in case you're wondering.
2006-10-29 15:23:33 · answer #6 · answered by selbrit 2 · 0⤊ 0⤋
Actually dark ocurs when there is no light or less. So the speed of the dark is the speed of light.
2006-10-29 15:42:05 · answer #7 · answered by nilanga_2005 1 · 0⤊ 0⤋
The speed of darkness is the same as the speed of light.
The only difference is that the light is leaving, instead of arriving.
2006-10-29 15:22:03 · answer #8 · answered by brian-upstairs 3 · 0⤊ 0⤋
speed of dark = the speed of light and vice versa.
when one leaves the other appears
2006-10-29 15:25:32 · answer #9 · answered by Billy 4 · 0⤊ 0⤋
It is the speed of light leaving the area.
2006-10-29 15:20:30 · answer #10 · answered by MINDNOVA 2 · 0⤊ 0⤋