Quote:
Originally Posted by renormalised
Actually, that's not the right answer. If it's dark, you can't see, so how can you tell what speed it's moving at  
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Can't you smell how fast it goes?
Actually, there's no reason you can't casually jog along just behind the front of the light and be able to see the dark receeding.

It works better than jogging backwards in front of the light front because you can't see the light front to know if you're in front of it, and next thing you know you collide with a light font coming up behind you and that can scare the willies out of you!
No, it's pure deduction... if the dark was slower, light would have to be slower... if dark was faster, there'd have to be something else that's not light and not dark in between the light and the dark...
Yeah, OK... but the speed of twilight is obviously slower at higher latitudes... this is where relativity comes in obviously...




Ah, now I see your point Carl! Dark is faster at higher latitudes!

We could be famous... Carl and Al's Theory of Relativity... no ones every come up with such an insight before!!!!
Apologies Ernie. Ask a serious, valid question and the clowns come out to play... I hope you don't mind.
Al.