Chlorophyll a is a green pigment that absorbs red and blue-violet light. Chlorophyll b absorbs wavelengths in the blue and red-orange parts of the spectrum. This chlorophyll occurs in plants, green algae, and a few photoautotrophic bacteria. They reflect wavelengths which are red, orange, and yellow. Usually the carotenoid molecule's backbone has a carbon ring at each end.
Many types are pure hydrocarbons.
These cartenoids are less abundant than chlorophylls in green leaves. Other accessory pigments are anthocyanins and phycobilins. Anthocyanins are pigments occurring in some flowers, and the phycobilins are the signature pigments of cyanobacteria and red algae. As we stated before, photosynthesis has two stages. Next, we are going to look into the first stage.