Why do plants need green light specifically? Could plants theoretically photosynthesize different wavelengths? Thank you for reading and have a good day.
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Photosynthesis works on the absorption of RED light (lower energy). Chlorophyll a and b absorb at around 690-700nm and this energy promotes electrons that travel through a transfer chain powering the reactions that generate adenosine triphosphate (ATP) which then powers the conversion of CO2 to sugar.
Accessory pigments absorb high energy blue light to protect the plant from being damaged by the high energy light. This leaves green light being reflected by the plant, so it appears green.
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