Question

What wavelengths of light drive photosynthesis?

Answer 1

Photosynthesis is most efficient at wavelengths 400 to 500 nanometers ( nm ) and between 600 to 700 nm.

Explanation:

Chrolophyll - a is the pigment found in most plants and is responsible for absorption of light.

Photosynthesis peaks at about 450 nm and 650 nm as these wavelengths are absorbed efficiently by chlorophyll - a . This range corresponds to the violet - blue and red parts of the visible spectrum.

However photosynthesis still occurs at wavelengths between 500 nm and 600 nm , as accessory pigments like carotenoids and xanthophylls also provide extra absorption.