Askscience comments cgdrd shadows travel faster than speed light

My sister leapt to the heart of this apparent paradox: Why isn't the light itself traveling faster than the speed of light? Isn't it also rotating in space.
For example, let's assume there is a light source, a point and a plane, Report comments that do not meet our guidelines, including medical advice . If shadows can travel faster than light then won't I be able to transfer.
Let me just add an interesting trivia to the other answers: you can have a shadow travel at any speed you like. The shadow isn't a material object. It is a region....

Askscience comments cgdrd shadows travel faster than speed light -- traveling

Click here for a list of related subs! Unlimited article access, anytime, anywhere. I'm still not entirely clear about how a shadow can move faster than the photons around which is it defined, but I'm sure that will be addressed later. If shadows can travel faster than light then won't I be able to transfer information at rate faster than speed of light? It's essentially the same in the laser example not atoms of course. Is Gravitation affected by the medium of which it acts?






Askscience comments cgdrd shadows travel faster than speed light -- going


Is it really possible to break the speed of light by flicking your wrist with a laser pointer? Any method like this is completely and totally useless for FTL communication, or really for much of anything at all. You're saying the "dot" or "point" of light that I seen on the surface on which I've shined the laser isn't actually a "thing" any more than the shadow is - it's merely the place at which the photons I originally shined from the laser are reflecting back into my eyes. The dot is not an object, it is simply the point of origin for the ray of light you are observing at any one time.

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Documents travelling salesman problem I recently read this article which I found on the "faster-than-light" Wikipedia entry. But it's not really movingand it's not really a thing. That is, if it can influence something, isn't it necessarily causal? Thanks for your help! I think I actually almost fully understand this!
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