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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