#3 Duckweed is a tiny floating aquatic plant that can reproduce so rapidly that

Question

#3

Duckweed is a tiny floating aquatic plant that can reproduce so rapidly that it can completely cover the surface of small fish hatchery ponds. One proposal to limit the growth of this invasive plant is to use colored panels to shield the ponds, inhibit photosynthesis, and kill this pest. What color filters would you order for the panels in this project? What wavelengths of light will be absorbed by these filters? Do you think this proposal will be effective in killing the duckweed? 4. In a classic experiment in photosynthesis performed in 1883 by the German botanist Thomas Engelmann, he surrounded a filament of algae with oxygen-requiring bacteria. He then exposed the algal strand

Explanation / Answer

since the wavelength band of green band is 550-500nm. you need to use the blue and red filters can remove light upto 500 nm and 550 nm. .

although controlling the weed growth by light is a good idea, few other methods can also be tried .like design and construction of ponds should be sloped steeply. usage of motor driven underwater weed cutters. increasing of tempareature above 30 c will also work.

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