The most effective wavelength of visible light in photosynthesis is in the region

violet

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blue

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yellow

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red

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Solution

The correct option is D red
Photosynthetically Active Radiation (PAR) is the amount of light available for photosynthesis, which is light in the 400 to 700 nanometer wavelength range.

The rate of photosynthesis is higher in red spectrum as all of red light is absorbed by chlorophylls and used effectively, while the rate of absorption is highest for blue light.

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