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Absorption of Light by Chlorophyll

Absorption of Light by Chlorophyll. Higher Biology. Light absorption by chlorophyll. Measuring light absorption. A spectrometer is used to measure the amount of absorption at each wavelength An action spectrum shows the rate of photosynthesis at different light intensities.

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Absorption of Light by Chlorophyll

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  1. Absorption of Light by Chlorophyll Higher Biology

  2. Light absorption by chlorophyll

  3. Measuring light absorption • A spectrometer is used to measure the amount of absorption at each wavelength • An action spectrum shows the rate of photosynthesis at different light intensities

  4. Chlorophyll A and B absorb light mostly in the red and blue regions of the spectrum • Carotene and xanthophyll absorb light from other regions and pass the energy to chlorophyll

  5. Brown seaweeds • subjected to low light intensities • Chlorophyll C instead of chlorophyll B • fucoxanthin -very wide absorption spectrum -absorbs light in parts of the spectrum where chlorophyll is less efficient

  6. Red seaweeds • Have chlorophyll D • Phycoerythrin

  7. Green seaweeds • Found in shallow water • Do not have fucoxanthin • Does not have phycoerythrin

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