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Re: [Phys-L] Where is the sky?

And Venus takes on a reddish hue as it rises or sets, as the shorter wavelengths are scattered more by the longer atmospheric path.

-----Original Message-----
From: Phys-l [mailto:phys-l-bounces@phys-l.org] On Behalf Of Bruce
Sherwood
Sent: Thursday, August 22, 2013 2:42 PM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] Where is the sky?

I'll point out that distant mountains, which provide a dark background that
makes the effect visible, look bluish presumably because the many miles of
air between you and the mountains are scattering sunlight into your eyes.
It's not fog, because the ridgelines are sharp. Note that 20 miles of sea-level
air between you and the mountains will give a lot of scattering.

Bruce
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