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Re: The blueness of water



On Thu, 25 Apr 2002, Robert Cohen wrote:

In the Jan-Feb 2002 issue of American Scientist, there is an article on
Crater Lake. In the article, it states "The lake's deep-blue color, for
instance, results from the molecular backscatter of downwelling light,
predominantly the short wavelengths in the visible light spectrum."

This raised some questions for me.


A fifth question: doesn't the color of dissolved minerals override the
H2O absorbtion and scattering spectrum? I suspect that a lake filled with
distilled water would look different than any existing lake. When dealing
with a slab of transparent material many meters thick, even the tiniest
impurity provides a very obvious coloration.


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