Question

Why do rate of photosynthesis is not high in continuous light?

Answer 1

Because its a biochemical and slow process through which solar energy convert to chemical energy..

Answer 2

Photosynthesis uses maximum up to 1.5 % light in the process and so light is generally not a limiting factor at high intensity. However, the light becomes a limiting factor in low intensity because no matter how much water or CO2 is present, without light photosynthesis cannot occur.