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Photosynthesis160-page4 - light equally Some light energy...

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Photosynthesis - 4 4. Light Waves Both light and light-absorbing pigments are needed for photosynthesis. Light is a form of electromagnetic radiation. Visible light is a combination of many wavelengths that we see as different colors (of the rainbow) in the range of 380 - 750 nm. Each wavelength is associated with a specific photon, or particle of energy. In general, shorter wavelengths have more energy. The light-absorbing photosynthetic pigments do not absorb all wavelengths of
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Unformatted text preview: light equally. Some light energy cannot be absorbed (and is reflected instead) and some is transmitted, or passed through the chloroplasts. The light waves most absorbed and most useful to photosynthesis are reds and blues. Not surprisingly, green light is absorbed poorly. In the laboratory we may do an experiment to demonstrate the absorption of different wavelengths of light by the photosynthetic pigments, an absorption spectrum....
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