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At 01:04 PM 3/13/2004, John M., you wrote:
When dew forms on clear nights, it will heavily wet lawns but willThe primary mechanism is radiation exchange with 2 pi steradians of a
hardly ever leave visible moisture on concrete walkways or asphalt
roads. There are many factors that regulate condensation:
temperature, available condensation nucleii, curvature, hydrophilic
surfaces, etc. - but I am having difficulty identifying the primary
one in this case. Any ideas out there?
3 kelvin blackbody plus high resistance thermal conduction pathways
to the ground and the (still) air.
--
John Mallinckrodt mailto:ajm@csupomona.edu
If we are to believe John, a vacuum enclosure with a suitably
transparent lid would allow a black chromed copper square (say),
if well insulated at sea-level, to cool to 5 or 6 K overnight?
I don't think so.
I think you would find it rather difficult to radiatively
chill any object at sea level to below -100 degC
Perhaps someone would care to try it?
Brian Whatcott Altus OK Eureka!