Question

Light saturation occurs at ............ % of the fall sunlight.

• A. $2\%$
• B. $5\%$
• C. $10\%$
• D. $20\%$

Answer 1

The correct option is A $2\%$

Light is an important factor in the process of photosynthesis. As the light intensity increases, the rate of photosynthesis increases. However, at certain intensity, light is no longer the limiting factor for the overall rate of photosynthesis. This is called as saturation point. At the light saturation point, increasing the light no longer causes an increase in photosynthesis. Light saturation occurs at 2% of the fall sunlight.

Thus, the correct answer is '2%.'