Red/Blue? Physics question

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doublehelix

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I saw this today - can someone please explain it to me? Thank you! :mrgreen:

 
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summoner

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Has to do with red shift and blu shift in determining velocity in space. If something is moving quickly toward you it is blue shifted.
 
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MeteorWayne

Guest
If it's blue, it means you are approaching it at more that 99.99% of the speed of light, which is a little quick even for the NJ Turnpike :)
 
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doublehelix

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Awwww... thanks, guys! That's a very clever bumper sticker. :mrgreen:

-dh
 
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