Answer:
When light hits a chlorophyll,it energises an electron
Explanation: light is an important factor in the process of photosynthesis.chlorophyll absorbs sun light ,particularly the blue and red region of the spectrum.
These photons of light hits a chlorophyll molecules and energises an electron.this electron becomes existed and passes from electron carrier to another until it is coupled to form ATP and NADPH in PS II and PS I respectively.
Also when PS II loses it's energised electron,light splits water molecules to yield protons,electrons and oxygen.
