A) 500-600 nm
B) 450-950 nm
C) 340-450 nm
D) 400-700 nm
Correct Answer: D
Solution :
Photosynthetically Active Region (PAR) of solar radiation is visible region. It consist of radiations having wavelength between 400 to 700 nm. Green plants use this wavelength in the process of manufacture of food i.e., photosynthesis.
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