In article <9l1acvo9rnd6u8ci0pehb6qv6pvguudkla@4ax.com>,
 Peter Popov <pet### [at] vipbg> wrote:

> It's just that the nitrogen molecule scatters blue. Dust can be of any
> color, making up for some gorgeous sunsets after a sandstorm (we had
> some last month when a heat wave from North Sahara hit us.)

Well, dust can be of any colored substance, but particles of the size 
that will stay in the atmosphere for any significant amount of time are 
small enough that they scatter blue wavelengths more. Similar to the 
reasons shorter wavelengths are used for higher magnification microscopy.

Try pouring a little milk into a glass of water and shine a flashlight 
through it...depending on the angle you observe it at, the scattered 
beam will appear blue or orange.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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