Answer: 1%
Explanation.
Generally Light energy needed by plants for photosynthesis occurs at wavelengths not ideal for mechanisms of photosynthesis. Large amount of light energy( about 99%) is reflected from the leaf surfaces, and other parts, while .some are absorbed by clouds, water vapour,.aquatic bodies . Some quantity are is converted to heat energy. Therefore only fractions(about 1 % of available energy from the initial light energy is converted to chemical energy for the process of photosynthesis. Thus the approximate efficiency of the light energy conversion to chemical energy in photosynthesis is 1%. That is the quantity of usable energy as chemical energy from the abundant light energy absorbed by the photosystems.
