If you want to get technical, there is no "darkness" just like there is no "cold." And, like absolute zero, there is no absolute darkness (its all relative to the position at which you take the measurement, but since light moves without time, at some moment in that point of time light will travel through that area of space, etc...). Since "darkness" can't be reached, the speed at which it travels is 0.
That was completely pulled out of my ass, if you couldn't tell. Make up your own theory! Kansas has to teach it!
I'm not trying to treat darkness as a substance or something that necesarily exists, and darkness is indeed a relative idea, being only a measurement of whether electromagnetic radiation within the visible spectrum is rebounding off of what's in our field of view. All I'm wondering is if the absence of light comes about as quickly as the presence of light.
Since the only thing that's moving is light, wouldn't it have to be the same? The only reason we see anything is because light is present, and our perception of darkness comes about because there is less light present than when we perceive a brightness. And when shifting from brightness to darkness or darkness to brightness, this too should happen at the same speed because the photons are all moving at the same speeds, there are just more/less of them. Of course, how quickly our brains process these things is another matter, but objectively, I think the speeds are the same.
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That was completely pulled out of my ass, if you couldn't tell. Make up your own theory! Kansas has to teach it!
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