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

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

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

Red seaweeds Have chlorophyll D Phycoerythrin

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

This powerpoint was kindly donated to is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.