Question

What is the percentage of Photosynthetically Active Radiation (PAR) captured by plants?

• A. 1
• B. 70-80%
• C. 40-50%
• D. 2-10%

Hint:

Plants utilize only a small fraction (2-10%) of Photosynthetically Active Radiation (PAR) for photosynthesis. Most of the sunlight energy is not converted into chemical energy.

Answer 1

The Correct Option is D

Photosynthetically Active Radiation (PAR) is the segment of the sunlight spectrum (400-700 nm) plants use for photosynthesis. Despite ample sunlight, plants efficiently capture only a small fraction of PAR. Studies reveal that just 2-10% of available PAR is converted into chemical energy via photosynthesis. The remaining energy is reflected, transmitted, or dissipated as heat.