what is the speed of darkness?
458139
There is no speed of darkness.  Darkness is simply an absence of light.
392981
Is the speed at which it travels.
194843
The speed limit of the universe is the speed of light in a vacuum, nothing with mass can obtain this speed or go any faster.\nIn a vacuum, light will propograte at the speed of light.  In any other medium, light slows down, it does not speed up (your thinking of sound waves that travel faster through denser mediums).\n\nThe inverse of time (unit: second) would be 1/t (or 1/second).  To an average person, this unit wouldnt mean anything, however, you sometimes will see data graphed nothing using time, but the inverse of time on the X axis.  This is done to make the graph easier to understand, since of course, happiness is a straight line.\n\nAny amount of time you can think of can be reduced into a smaller amount. 1 second?...1/2 second.  A nanosecond?...an attosecond (E-18 s).  You can always find a smaller unit, there is no absolute unit of time.
532393
Speed is defined to be the distance between two points in space and the time it takes for something to go from one point to the other.\n\nIf it is dark simultaneously at two different points, then darkness travels a finite distance in zero time, so the speed is infinite.\n\nIf God is everywhere in the universe, then obviously it takes him no time at all to get from one place to the other, because he is already there.  So is speed is infinite.
925293
c = lambda x nu\n\nc is the speed of light 3.0 x 10^8 m/s\n\nlambda is the wavelength\n\nnu is the frequency
600967
No there is no 'summation' of speeds involved with light.  Light is Electro-Magnetic Energy, although light travels as particles as well as waves.  In this Universe the speed of light is a constant, roughly 186,000 miles-per-second, or 300,000 km/sec or 300 Mega-Metres / sec.  Unless some POWERFUL external force acts upon light, it cannot change speed.  This entails the gravity of black-holes and such. (Not even light can escape from them.)\n\nA vehicle might weigh somewhere in the neighbor-hood of 3,300 lbs. (Approximately 1,500 Kg, for those of you who have not learned to count properly, just yet ...)\nCheck out da' math ...\n\n60mph = 100 kmph = 27.77r mps. \n(1,500 Kg x 27.77r mps) / 9.81 mps = ~ 4,246 N\n\nI doubt, very seriously, that a little over 4,000 Newtons is enough force to even put a dent in the factor of light-speed.  For more info, look-up Einstein's Theory of Realtivity' (Although I believe 90% of it to be short-sighted ancient crap ...)  This subject is covered in it ...\n(umm covered in Einstein's Theory, not copvered in crap .. which err .. is the same thing at times ...
435346
10% of the speed of light is roughly 1,116,000 mph (186,000 mp/sec * .1 and then mult by 60).\nIt is roughly 1,796,000 kph.
426222
The speed of light is the same no matter where it is. It is 299,792,458 meters per second.
6671
The exact speed of light is 299,792,458 m/s\n\nTo be precise, what we usually call the "speed of light" is really the speed of light in a vacuum (the absence of matter). In reality, the speed of light depends on the material that light moves through. Thus, for example, light moves slower in glass than in air, and in both cases the speed is less than in a vacuum. However, the density of matter between the stars is sufficiently low that the actual speed of light through most of interstellar space is essentially the speed it would have through a vacuum, so we don't make much error by ignoring the difference.\n\nTo make it easier for you to convert, here is the speed in alternative units :\n\n(1) 983,571,056.4304461 foot/second\n(2) 11,802,852,677.165352 inch/second\n(3) 1,079,252,848.8 kilometer/hour\n(4) 299,792.458 kilometer/second\n(5) 582,749,918.3585312 knot\n(6) 880,991.0899527 mach\n(7) 670,616,629.3843952 mile/hour (mph)
43761
The speed of light in a vacuum is exactly 299,792,458 metres per second (or 1,079,252,848.8 km/h, which is approximately 186,282.397 miles per second, or 670,616,629.4 miles per hour; sometimes roughly 300,000 km per second). This value is denoted by the letter c, reputedly from the Latin celeritas, "speed", and also known as Einstein's constant. Note that this speed is a definition, not a measurement, in that the fundamental SI unit of distance, the metre, is defined in terms of the speed of light: one metre is the distance light travels in a vacuum in 1/299,792,458 of a second. The speed of light through a transparent medium (that is, not in vacuum) is less than c; the ratio of c to this speed is called the refractive index of the medium.
570639
As the speed of light is approached time slows.\nThis is given by the formula Sqrt(1-v^2/c^2) where\nv=velocity\nc=speed of light\n\nAt the speed of light time stops Sqrt(0) = 0\n\nFaster than the speed v exceeds c so v/c >1\n\nsqrt of a negative is imaginary.\n\nThe only thing you can see when traveling faster than a light is a snuffleupagus. (Because their IMAGINARY. or least they used to be back in the good old days.)
63049
Darkness has no speed. However if you could put a speed to darkness it would be amazing. If you could actually produce the absence of light, you would have created pure genious. As of right now, Darkness doesn't have a speed because it is nothing. That is like saying how much am i worth, if you don't have money. Technically you're worth $0 but am I trying to say that you are worth the absence of money. You don't have money so your worth nothing. Darkness isn't something that has a speed because it is the absence of light. I guess a better analogy would be: The absence of money has no worth.
932886
the speed of light = 299 792 458 m / s or 1079252848800 M/H\ncircumference = 2*Pi*R \nso 2* 3.14159*R= 107925848800M/H\n1079252848800/(2*3.14159)=R\nRadius= 1.71768571 × 1011(<--- times 10 to the 11th power) meters
311698
I'm not sure if this is what you are looking for, but rapidity, in special relativity, is defined as \n\ntanh(rapidity) = v/c,\n\nwhere v is the speed of the particle, and c is speed of light.  For v << c, rapidity ~= v/c; for high v, it may be a more intuitive measure of speed beacuse it ranges from 0..infinity (as opposed to v/c, which is always < 1)
468247
The speed of light is constant, approximately 300,000km/second. \n\nThe principals of relative motion are that if you are travelling at a speed, and you look at something else travelling at another speed, your perception of the speed of that something else will be the difference between your two speeds. For example if you are travelling 60, and you get overtaken by someone going at 70, you perceive them to be travelling at 10, since they travelling at 10 relative to you. \n\nHowever, you can never perceive the speed of light to be anything different than it's constant value. Therefore, if you travel at half the speed of light, time actually slows down to half of what it normally is, since this is the only way for the speed of light to remain constant. \n\nTherefore if you travel at the speed of light, time stands still. To answer your question, I don't know what you'd see, but probably nothing!\n\nTheres a more complicated explanation involving the magnetic and electric fields of a photo of light, but that's the basics.
418308
The speed of light in a vacuum is exactly 299,792,458 metres per second (or 1,079,252,848.8  km·h-1, which is approximately 186,282.397 miles per second, or 670,616,629.4 miles per hour).
859647
The speed of light is an illusion imposed upon us by the Almighty. He lets you see the light whenever He wants you to.