Opalescence and Color
http://www.gsf.net/html/londonblue.html
http://www.birdsforever.com/bluejay.html
Some other blue
coloration's in nature besides the sky are blue eyes, the opalescence of
some gem stones and the color in a blue jays wing.
The tints of
blue vary with the amount that the light scatters.
Critical Opalescence
is when fluid is near a temperature and there are density changes. This
is responsible for most color changes.
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