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 Speed of dark...I believe Muhammad Ali gave one possible answer: the time it takes for a small kid afraid of the dark to reach the bed after switching off the bedroom light. Obviously Mr Ali didn't have a bedside lamp as a kid. I can relate to that: nor did I. But I believe I have discovered the answer. However you measure the speed of light - 186,000 miles-per-second, or 300,000,000 mps; or through that medium that brings the speed down to 38 miles per hour; it is always positive, and generally called 'c'. Now, as the dark retreats before the light, then its speed must be a negative quantity, of the same magnitude as c. Hence the speed of dark is -c. What do you reckon? (Yeah, I know: 'dark' is a privative - not a thing, but the absence of a thing, and therefore can not have a speed. As it happens, as a result of excellent night vision, and growing up in the boonies as a kid where there wasn't much in the way of light at night, I was never much afraid of the dark when I was little. All the same, I can see how dark can take on a frightening tangibility that ill sorts with the notion that it doesn't really have a presence of its own. So, a bit of creativity here, eh? Or ignore the thread, as you choose... |
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It could be argued... |
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tactical_abyss 28-Feb-13, 18:21 |
Deleted by tactical_abyss on 28-Feb-13, 18:24.
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tactical_abyss 28-Feb-13, 18:24 |
As to dark matter,here's some trinket bits of info I copied and pasted: "or you could say that darkness is instantaneous and that light is just in the way of it but it is there... its just that photons are blocking it and that when they are gone it is instantly there." "Darkness is the absence of light, therefore the speed of darkness is the speed it arrives, therefore the same as the speed of the departure of light. The speed of darkness = the speed of light." |
