Choose the correct answer from the alternatives given. The rate of photosynthesis declines in the presence of
A
Green light
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B
blue light
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C
orange light
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D
far red light
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Solution
The correct option is A Green light
The wavelength of light is also important in the process of photosynthesis. As we know that the PSI absorbs energy most efficiently at 700 nm and PSII at 680 nm. Light with a higher proportion of the energy of different wavelengths will produce a different rate of photosynthesis i.e the more the wavelength the effective photosynthesis occur. Certain red and blue wavelengths of light are the most effective in photosynthesis because they have exactly the right amount of energy to energize, or excite, chlorophyll electrons. Greenlight is considered the least efficient wavelength in the visible spectrum for photosynthesis, but it is still useful in photosynthesis. So the correct option is 'Green light'.