Thanks. That's the sort of thing I should be able to use effectively after I declutter my skull a bit (Just been to my boy's parent-teacher meeting).
On Wed, Nov 19, 2003 at 07:19:44AM -0800, Robert Smith enlightened us thusly > Declan -- > > I'll stick my neck out a bit here. > > Several years and at least a couple of lives ago, I took a detour into > the wonderful world of optics. Here are a few things I remember -- > > All physical bodies above the temperature of absolute zero emit > electromagnetic radiation in a characteristic spectrum dependent on > their absolute temperature. The amplitude and wavelength of this > spectrum can be approximated by the so called "black body radiation" > curve. A so called "black body" is an idealized radiating object of a > known temperature which meets certain criteria such as not reflecting > or passing any radiation, i.e., it is completely absorbing of all > incident radiation. It is often thought of as a box (or a sphere) > with a hole in it, which is completely coated on the interior with > soot (carbon), i.e., "black". > > Depending on temperature, bodies radiate in the far infrared (for very > cool bodies [my wife for example]) to the gamma region (for _very_ hot > bodies. > > Try the following two links for further useful reading, including some > examples of the radiation curves of the human body and the sun given > in the second link. > > http://www.phys.virginia.edu/classes/252/black_body_radiation.html > > http://www.unidata.ucar.edu/staff/blynds/tmp.html#Uni > > Caveat -- I make no representation of being an authority in the field > of optical physics, the above is only what stuck to me on my tour > through the wonderful world of optics and radiation physics. > > Hopefully, Uwe will catch any gross errors that I have made. > > > > > > > >What I am looking for is reading to check the feasability. I need > > > >the freauencies that everything emits. We all enjoy discussing > > > >the design strategy, but I haven't given out enough info to get > > > >much help on that. Where I need the help is a treatment of what > > > >frequencies things emit (Particularly people and the sun). > > > > > > > > > > > > > > > Are talking about optical wavelengths? There are a lot of sites > > > where you can find solar spectra under different conditions. I > > > can't give away too much info, but there exists extremely small > > > optical bandpass glass filters (I have used a Schott filter..). > > > > Thanks. This is annoying me big time as everyone is talking spectra > > but not so many give numbers. I'll look again. Maybe iut was just a > > poor choice of earch keywords. -- With best Regards, Declan Moriarty. -- Author: Declan Moriarty INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
