Re: Could human skin be photosynthetic?



Rock Brentwood <markwh04@xxxxxxxxx> wrote:
On Oct 8, 12:41 pm, Uncle Al <Uncle...@xxxxxxxxxxxxx> wrote:
3) Tell us how to power a photosynthetic animal without frying it
outright at any frequency, microwave to visible to Co-60 gamma.

It was stated elsewhere in the thread that the solar intensity is 1000
watts per square meter. I'm pretty sure that's only 100 watts per
square meter.

Physics Today March 2007 p37 "Solar energy conversion" states that
the sun delivers a power of P = 1.2x10^5 TW to the earth; the radius
of the earth is r = 6.37 Mm; so the area of the earth's disk is
A = pi r^2 = 1.3x10^14 m^2.

This gives an average intensity of P/A = 940 W/m^2.

--
---------------------------------+---------------------------------
Dr. Paul Kinsler
Blackett Laboratory (QOLS) (ph) +44-20-759-47520 (fax) 47714
Imperial College London, Dr.Paul.Kinsler@xxxxxxxxxxx
SW7 2BW, United Kingdom. http://www.qols.ph.ic.ac.uk/~kinsle/

.



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