Question

What is the percentage of photosynthetically active radiation(PAR), in the incident solar radiation.

• A. 100%
• B. 50%
• C. 1 - 5%
• D. 2 - 10%

Answer 1

Answer: (B)

50%

• Around 50% of the total radiation from sunlight falls under photosynthetically active radiation and supports the process of photosynthesis. It constitutes the light of 400-700 nm wavelength which is absorbed by chlorophyll pigment. Out of which only 2 - 10% are captured by plants. Thus, the correct answer is option B.