I've been looking around, and can't find a solid answer. Many websites say darkness is the speed of light due to the fact it is the absence of light, but other sources say otherwise, that in some cases darkness is actually faster in some cases. Could someone clarify this for me?
closed as unclear what you're asking by James K, called2voyage♦ Jan 14 '17 at 6:09
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The darkness does not have a speed, as it's just the space the light travels through. It's always there until the brief instant a photon whizzes through.
It would be analogous to asking what speed the road is travelling at, rather than the car.
In this image this is shown that suppose there is darkness on any many light year far object if someone switch the torch in the direction of object and after some instant raise his hand and cover the light then before the light the darkness will reach on object which is completely wrong. Since the darkness which is assumed to be reach before light is the darkness there before the light reach on the object.