Huh... Well, the only other thing I can think is that perhaps he was referring to percentage of total insolation at Top of Atmosphere? Roughly 46% of solar radiation is absorbed by the atmosphere.
--- Horace Heffner <[EMAIL PROTECTED]> wrote: > Oh, I just noticed the CRC table is located on page > 14-10, not 18-10 > as I noted. If you look at solar insolation factors > by frequency you > see it drops off to nothing at the tails. For > example, from 0 to 120 > nm there is only 0.00044 percent. From 120 to 140 > there is only > another .00009 percent. The table actually shows > that from 0 to > 100,000 nm the cumulative percent of solar > insolation is 99.999002 > percent. So basically we are quibbling about a few > thousandths of a > percent. Below is an updated table using your > range. > > Percent solar constant at aircraft altitude: > > Lambda (nm) Cum % % Range > > 0 - 10 *** less than 0.00044 percent*** > 10 - 400 8.725 8.725 UV > 400 - 700 46.879 38.154 Visible > 700 - 100000 99.999 53.120 IR > 100000 - 1000000 *** less than .000998 percent *** > > Derived from page 14-10 of the 74th Edition of The > CRC Handbook. > > The original article seems to leave out about 54 > percent, which is > not even close. > > Here is the quote again: > > > > > One challenge for organic solar cells has been > the efficient > > capture and conversion of sunlight. Sunlight is > comprised of > > photons (particles of light) that are delivered > across a spectrum > > that includes invisible ultraviolet (UV) light, > the visible > > spectrum of colors -- violet, indigo, blue, green, > yellow, orange > > and red -- and the invisible IR spectrum. The > amount of incoming > > photons across the UV, visible and IR spectrums is > about 4, 5 and > > 45 percent, respectively. > > > > > On Jan 17, 2006, at 8:11 AM, Merlyn wrote: > > > According to my table > > > (http://hyperphysics.phy-astr.gsu.edu/hbase/ems1.html) > > > > UV is only considered to be wavelengths between > 10nm > > and 400nm, and IR is wavelengths from 750nm to 1mm > > (1,000,000nm) > > > > So, your table does not include x- and gamma- > rays, > > nor the RF frequencies. > > > > --- Horace Heffner <[EMAIL PROTECTED]> wrote: > > > >> > >> On Jan 16, 2006, at 6:16 AM, Merlyn wrote: > >> > >>> Doesn't have to total to 100% > >>> IR, Visible, and UV do not cover the entire EM > >>> spectrum, the sun puts out energy over a very > >> broad > >>> range of frequencies. > >>>> > >> > >> > >> > >> Sure it does. Look at the table again. > >> > >> > >> > >>>> Percent solar constant at aircraft altitude: > >>>> > >>>> Lambda (nm) Cum % % Range > >>>> > >>>> 0 - 400 8.725 8.725 UV > >>>> 400 - 700 46.879 38.154 Visible > >>>> 700 - 100000 99.999 53.120 IR > >>>> > >>>> Derived from page 18-10 of the 74th Edition of > >> The > >>>> CRC Handbook. > >>>> > >>>> Horace Heffner > >> > >> > >> > > > > > > Merlyn > > Magickal Engineer and Technical Metaphysicist > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > > > Merlyn Magickal Engineer and Technical Metaphysicist __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
