Re: Wood effect

["Carl Schofield" <cschofi1@xxxxxxxxxxxx>]

----------
>From: Jesko-Henning Tanke <jesko-henning@xxxxxxxxxxx>
>Subject: Re: Wood effect

The effect is caused by the structure of
> the chlorophyll containing leafs, which absorb most radiation below
> infrared. Only green gets (mostly) emitted after beeing reflected in the
> parenchym layer of the leaf. Wavelengths above 680nm are reflected there
> with no absorbtion at all thus producing the nice light spots on the IR
> film.

If chlorophyll absorption of visible light is involved in this effect then
why do red and gold autumn leaves still produce that nice white glow in IR
images?
*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************