BY4.3 Photosynthetic Pigments and Spectra

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Photosynthetic pigments:

absorb light energy and convert it into chemical energy

different wavelenghts of light are trapped by differnet pigments

there are 2 main types of pigments: chlorophyls and carotenoids


  • mainly absorb light at the red and blue-violet regions of the spectrum
  • most common:
    • chlorophyll a
    • chlorophyll b


  • absorb light from the blue-violet region of the spectrum
  • act as acessory pigments
  • main types:
    • carotene


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