What is the percentage of photosynthetically active radiation (PAR) in
the incident solar radiation?
Answer & explanation
Correct answer: option 3
Of the incident solar radiation less than 50 per cent of it is photosynthetically active radiation (PAR). We know that plants and photosynthetic bacteria (autotrophs), fix sun’s radiant energy to make food from simple inorganic materials. Plants
capture only 2-10 per cent of the PAR.