Environmental Engineering Reference
In-Depth Information
100
Chlorophyll b
80
Chlorophyll a
Carotenoids
60
40
20
0
100
80
60
40
20
0
400
500
600
Wavelength (nm)
700
FIGURE 12.8
Variation in absorption and the rates of photosynthesis as a function of the wavelength of
light. (From Wikimedia Commons.)
FIGURE 12.9
Pietro Angelo Secchi, 1818-1878 and his Secchi disk. (From Wikimedia Commons.)
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