Re: heat value in each color in sunlight - science demo doesn't work well

On Sun, 11 Dec 2005 16:22:41 GMT, mack <jmack@xxxxxxxx> wrote:

>(replying to myself...). I'll try a box with the
>inside of (reflecting) aluminum foil. I need to
>get some more thermometers first

I predict that the box with aluminum foil will get very hot. Bare
aluminum strongly absorbs IR. That is why things that need to stay cool
in the Sun (like observatory domes) are painted white, not shiny
aluminum.

Gold is a good reflector of IR- might be interesting to gold plate the
back of one of your boxes. What's your budget? <g>

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
.