Photosynthetically Active Radiation (PAR) has the following range of wavelengths
A
340-450 nm
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B
400-700 nm
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C
500-600 nm
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D
450-950 nm
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Solution
The correct option is B 400-700 nm Photosynthetically active radiation is the range of solar radiation which is received by plants and absorbed maximally for the process of photosynthesis. It has a range of 400-700 nm.
Rate of photosynthesis is maximum at 647-660 nm while 690-700 is insufficient for photosynthesis.