Of the incident solar radiation, less than _______ of it is photosynthetically active radiation (PAR).
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 50 percent
Only part of sunlight can be used in photosynthesis; this part is the photosynthetically active radiation (PAR). Of the incident solar radiation, less than 50 per cent is PAR, and plants capture only 2–10 per cent of the PAR.
NCERT Extract:
Energy Flow –
