Walter,
>
> entire thing to look for, remember that your corals only use the blue
> spectrum of that light and that is the light between 400 and 500 nanometers,
> that means that the portion of the PAR between 500 and 700 is not used at
>
> Sorry, that statement is incorrect. Have a look at the absorption spectrum
> of chlorophyll a/b as follows:
> ttp://www.hort.purdue.edu/hort/courses/HORT301/spec/pigspec.gif
>
> Note that for chlorophyll a/b there is a significant peak of absorption
> between 600 and 700 nm. A far better statement would be to say that
> zooxanthellae (which perform the photosynthesis, not the corals) do not use
> light that is green or yellow, roughly between 500 and 600nm. You could then
> "may be" extend that to say that more is absorbed in the blue area (energy
> wise) that the red, due to the wider absorption band, increased area under
> the curve, and the higher energy of blue light versus red light.
>
For ease of matching wavelengths to colours you can use this image:
ttp://www.fredonia.edu/bio241/images/10.5_The_electromagnetic_spe.JPG
Catch ya,
DBW | [EMAIL PROTECTED]
reefs.org Administrator
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