I was thinking about those far end IR scanners used to monitor travelers for 'fever'. So this may be a little O.T.
A prctical 'blackbody' radiates more heat. A good reflector is a poor emitter. I just read more about it from a Physics text (Sears, Zemansky and Young). :-) "Chris Maxwell" <chris.maxw...@nettest.com> wrote on 05/13/03 01:35 AM > Dark skin radiates better, hence the dark coloring of people with African ancestry. The text did mention that the radiating charateristic of the human body ( any skin pignentation, I supppose) is a very good approximation to a 'blackbody' as far as the far-end IR for body heat is concerned. That is of course, provided that it's temperature is not so high that it became self-luminous! For what it matters, the 'Agfans' seem to favour wearing black. I suppose apart from the practical reason of not needing frequent washing ;-), I suppose these black 'clolors' radiate better under the shade and thus are 'cooler'. Since it can be so, would anybody go for black equipment housing operating in hot areas (scorching, 100°F ( high 30s°C) summerdays, or housing that are close to heat sources like car engines and water heaters)? Or for that matter using black bedsheets. I suppose it can be more than a cosmetic/fashion statement. Just my 2 ¢ worth. Tim Foo This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
