Light Absorption by Chlorophyll in Biology
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
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Explore how chlorophyll absorbs light in photosynthesis, the role of different types of seaweeds, and the use of spectrometers to measure light absorption. Discover the specific light regions absorbed by chlorophyll A and B, as well as adaptations in seaweeds for varying light intensities. Learn about the unique characteristics of chlorophyll C, phycoerythrin, and fucoxanthin in different seaweed species. This comprehensive presentation sheds light on the fascinating world of light absorption in plants.
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Presentation Transcript
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 www.worldofteaching.com http://www.worldofteaching.com 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.
