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-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
bounces@carnot.physics.buffalo.edu] On Behalf Of Larry Woolf
Sent: Monday, September 04, 2006 2:59 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Albedo and GW.
Dry air is nearly transparent, in the IR as well as visible. You can
verify this for yourself by walking around in the high desert at night:
skin
exposed to the sky feels cold, even if the air is not particularly cold.
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Air has windows of transmission in the IR; some regions are quite opaque:
http://www.coseti.org/atmosphe.htm
It is true that the wavelength range where room temperature bodies emit
most of the IR (7.5-13 microns), air is quite transparent.