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Light energy = exists in ... nature (some are in visible portion of spectrum, plants are in tune with this spectrum, 380 - 740 nm)We see wavelengths in color, different wavelengths .... different colors.Three major pigments :Chloropyll a, ...., ..........A + B= reflect green lightCarotenoids = ....., red, purpleThat's why leaves change color in fall. As chlorophyll breaks down in the fall, we can see the carotenoids (thus the shifting colors of leaves)

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