[TML] Alien ecologies

[Knapp]

On Fri, Aug 29, 2008 at 8:14 AM, Jerry W Barrington
<jerry.barrington at gmail.com> wrote:
> On 8/29/08 12:50 AM, "Knapp" <magick.crow at gmail.com> wrote:
>
>> For light to get to the chlorophyll it must go through the leave. What
>> and how much does this filter out of what gets to the chlorophyll? If
>> it is significant how does this effect what the chlorophyll is tuned
>> to?
>
> Leaves are extremely thin for exactly this reason.  It minimizes the
> filtering by non-chlorophyll parts.  Considering that most of visible light
> makes it thru miles of atmosphere, I suspect the sub-millimeter thickness of
> most leaves is trivial.
>

Maybe, but somethings might block ALL the light of some frequencies.
Also air is not a solid. Leaves and skin do make use of this.
Melatonin come to mind for humans.


-- 
Douglas E Knapp

http://sf-journey-creations.wikispot.org/Front_Page