absorption of light by chlorophyll n.
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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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Presentation Transcript
measuring light absorption
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
slide4

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
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
Red seaweeds
  • Have chlorophyll D
  • Phycoerythrin
green seaweeds
Green seaweeds
  • Found in shallow water
  • Do not have fucoxanthin
  • Does not have phycoerythrin
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