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What are the colors (of the electromagnetic spectrum) absorbed by plants? What would happen to photosynthesis if the green light waves that reach a vegetable were blocked?

Answer»

Chlorophyll absorbs all other colours of the electromagnetic spectrum but it practically does not absorb the green. The green colour is reflected and such reflection provides the characteristic colour of plants. If the green light that reaches a plant is blocked and exposure of the plant to other colours is maintained there would be no harm to the photosynthesis process. Apparent paradox: the green light is not important for photosynthesis.

There is a difference between the optimum colour frequency for the two main types of chlorophyll, the chlorophyll A and chlorophyll B. Chlorophyll A has an absorption peak at approximately 420 nm wavelength (anil) and chlorophyll B has its major absorption in 450 nm wavelength (blue).



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