General PAR posts #3
by, 01-09-2012 at 02:57 AM (179 Views)
Responding to the acknowledgement of the usefulness of the last "posts" entry with more goodies:
Honestly I found that so long ago and so many other studies I found were because of that I just assumed everyone knew...been spending winter break wisely, piling up the archives....
check this out:
(I would hope I get some rep for it at least, even tho soliciting for it makes me feel odd)
and this is cool looking too!:
which if you can read the small font, makes this a fun read:
my favorite part of which is the following:
For example, the major constituent of the atmosphere, nitrogen, has a Rayleigh cross section of5.1×10−31 m2 at a wavelength of 532 nm (green light). This means that at atmospheric pressure, about a fraction 10−5 of light will be scattered for every meter of travel.
and this part might address why you gotta have your stuff close, or reflectors close(r)
The strong wavelength dependence of the scattering (~λ−4) means that shorter (blue) wavelengths are scattered more strongly than longer (red) wavelengths. This results in the indirect blue light coming from all regions of the sky. Rayleigh scattering is a good approximation of the manner in which light scattering occurs within various media for which scattering particles have a small size parameter.
All of which I will conclude for the night with by indicating that info like this is not what you life by, its what you use to DIAL-IN