That's an interesting article you've found. However, the statements made in it in regards to green light not being used in photosynthesis is the very reason that Dr. D.R.Hershey wrote the article I included. His articles are provided with references to testing procedures and results that prove beyond any doubt that green light is absorbed to the extent of nearly half of it's total, by a plants photosynthetic pigments.
Secondary pigments are advanced study usually performed at college level. Even many college texts still use out of date material in this regard.
When photosynthesis is discussed in lower level schools and texts, only Chlorophyll (A) is generally spoken of.
[FONT=Verdana, Geneva, Arial, Helvetica, sans-serif]Dr. Hershey's article is one directed to the teachers of botany so that they can correct their texts and class instruction. His works are accepted by all botanists because of the extensive testing results he provides to enforce his statements.[/FONT]
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[FONT=Verdana, Geneva, Arial, Helvetica, sans-serif]Instruction texts and most research texts only discuss chlorophyll (a).[/FONT]
As shown in the below text from the same source you used, (Encarta), chlorophyll (B) also absorbs "light energy of a different wavelength". Encarta doesn't explain it in depth, but one of the other wavelengths absorbed by chlorophyll (B) is the green wavelength. Because of the reflectivity of chlorophyll (A) much green light is reflected away from the plants receptors, but almost half of the available green wavelength is absorbed and used in photosynthesis. Dr. Hershey is considered the authority in this area of study.
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[FONT=Verdana, Geneva, Arial, Helvetica, sans-serif]"Several kinds of chlorophyll exist. They differ from each other in details of their molecular structure and absorb slightly different wavelengths of light. The most common type is chlorophyll a, making up about 75 percent of the chlorophyll in green plants. It is also found in cyanobacteria (formerly known as blue-green algae) and in more complex photosynthetic cells. Chlorophyll b is an accessory pigment present in plants and other complex photosynthetic cells; it absorbs light energy of a different wavelength and transfers it to chlorophyll a for ultimate conversion to chemical energy."[/FONT]
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[FONT=Verdana, Geneva, Arial, Helvetica, sans-serif]For the complete article,
CLICK HERE
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Mutt said:
Hey stoney I love debating with ya man. Been a while since we had a report debate.
There are so many reports that contradict each other out there.
Photosynthesis and color spectrum note:
and also, this link is for tool46
Here is a link that gets into light and photosynthesis. If you like tech. stuff its worth a read.
http://www.sunmastergrowlamps.com/SunmLightandPlants.html
Original Paper: Link added by Stoney
CLICK HERE