Absorption of Light

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Absorption of Light

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Biology  /  Textbooks  /  Boundless Biology  /  Photosynthesis  

/  The Light­Dependent Reactions of Photosynthesis

Concept Version 4

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Absorption of Light

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Absorption of Light

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Pigments, like chlorophyll and carotenoids, absorb and reflect

light at a certain region of the electromagnetic spectrum.

LEARNING OBJECTIVE [ edit ]

Differentiate between chlorophyll and carotenoids.

KEY POINTS [ edit ]

Plant pigment molecules absorb only light in the wavelength range of

700 nm to 400 nm; this range is referred to as photosynthetically­

active radiation.

Violet and blue have the shortest wavelengths and the most energy,

whereas red has the longest wavelengths and carries the least amount...