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Talk:Blue

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This is an old revision of this page, as edited by 200.191.188.xxx (talk) at 18:53, 5 December 2001 (Blue laws). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Why is water blue? --AxelBoldt


Because of the tail of an absorption at around 750 nm absorbs the red. The absorption is an overtone of the O-H stretching vibration.


Interestingly, heavy water (D2O) is colourless, because the absorption band is at a longer wavelength (~950 nm). -- DrBob

"In German, "blue" means "drunk"."


Is it possible that this is connected to the origin of the term "blue laws"? I read something on encyclopedia.com about "blue paper they were written on," but that assertion seems asinine at best. A linguistic connection to German immegrants just feels more probable.--BlackGriffen


What are "blue laws"? Maybe they should be mentioned on the main article as well. --AxelBoldt


Good point. "Morals laws" governing alcohol, gambling, sexually-realted materials, etc.


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