Two groups (A and B) or bean plants of similar size and same leaf… - Vidyadip

Question

Two groups (A and B) or bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to light of wavelength 400-450nm and Group B to the light of wavelength of 500-550nm. Compare the photosynthetic rate of the two groups by giving reason.

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Answer

Group A will show more photosynthesis. Chlorophyll absorbs maximum light in the blue region of the spectrum, i.e., 400-450nm and hence, photosynthetic rate will also be high. Group B will show negligible amount of photosynthesis or no photosynthesis. Chlorophyll does not absorb any light in the green region, i.e., 500-550nm, but reflects green so, plants appear green.

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