What wavelengths of light are used by chlorophyll? What is the role of secondary pigments?

1 Answer
Linica Uday
Sep 21, 2017

Photosynthesis is most efficient at wavelengths 400 - 500 nanometers and 600 - 700 nanometers.

Explanation:

Photosynthesis peeks at about 450 nm and 650nm as these wavelengths of light are absorbed efficiently by chlorophyll a. The range corresponds to the violet - blue and red parts of the visible spectrum. Chlorophyll a is the primary pigment found in most parts of the plant.

Photosynthesis still occurs at other wavelengths between 500nm and 600nm as accessory pigments such as carotenoids and xanthophylls also provide extra absorbtion.

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