Both photosynthesis and cellular respiration occur in the cells of plants and algae. Whole Ecosystem View, review Fig. 9.1 Color and the Characteristics of Visible Light Radiation from the sun travels in waves that differ in length and energy content. Short wavelengths have the most energy. Visible light - small part of electromagnetic spectrum.
White light consists of several colors of light.
Pigments take on the color of light that is not absorbed. This is a flow of electrons driven by the sun. Water is split for its electrons and hydrogen. Electrons being passed along an electron transport chain causes the proton concentration to rise within the thylakoid space. This forms a proton gradient.