On Fri, 9 Mar 2012 03:35:06 +0000, Crispin Pemberton-Pigott wrote: >Because glass is a pretty good absorber of IR it is also a pretty good >emitter.
Surely glass absorbs the higher energy spectrum we can't see in the UV band ( which is why you won't get a tan beside a close window) and passes visible light and higher frequency infra red from hot bodies, like the sun, but absorbs the lower energy infra red from cooler bodies like earth and our bodies. This is the "greenhouse" effect, other substances act similarly but we'd best not go there. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/
