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Absorption of Light by Chlorophyll Higher Biology.

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Presentation on theme: "Absorption of Light by Chlorophyll Higher Biology."— Presentation transcript:

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2 Absorption of Light by Chlorophyll Higher Biology

3 Light absorption by chlorophyll

4 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

5 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

6 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

7 Red seaweeds Have chlorophyll D Phycoerythrin

8 Green seaweeds Found in shallow water Do not have fucoxanthin Does not have phycoerythrin

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