An experiment was done in which different coloured light were shone onto a water plant separately and the rate of production of oxygen was measured. which coloured light will produce the lowest rate of production of oxygen? explain your answer

Answer 1

Green light (550 nm) is the least effective in causing photosynthesis, largely because chloropyll reflects so much of it. Extreme violet (400 nm) and red (700 nm) light are also relative4ly ineffective.

http://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.html

shows the sensitivity to wavelength (color)