Role of light in Photosynthesis

Not all wavelengths of light are absorbed by chlorophyll. Of all the colors, green least absorbed, hence the reason that leaves look green. From the diagram we see that percentage absorbtion fluctuates with the lowest point above the wavelength of green, thus blue and red are used to the greatest benefit. Even though green has the lowest absorbtion, it still absorbs about 20%, this is due the fact that there are other enzymes other than chlorophyll active in the leaf.

(The redline shows, the amount of that specific wavelength (color) that is used by the process of photosynthesis)

(The blueline shows the amount of that specific light that is absorbed.)