Q. Of the total incident solar radiation the proportion of PAR is
A) More than 80%
B) About 70%
C) About 60%
D) Less than 50%
Explanation
[Solution from source] Of the total incident solar radiation, less than 50 percent is photosynthetically active radiation (PAR, 400–700 nm). Plants capture only about 2–10 percent of this PAR. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.