Question

What percent of the incident solar radiation is photosynthetically active radiation (PAR)?

(a) 100%

(b) 85%

(c) 20%

(d) 50%

I got this question during an interview for a job.

This intriguing question comes from Ecosystem topic in section Ecosystem of Biology – Class 12

Answer 1

Correct answer is (d) 50%

To elaborate: Almost less than equal to the 50% of the incident solar radiation is photosynthetically active radiation (PAR). It ranges from 400nm to 700nm.