The primary function of chlorophyll in photosynthesis is to absorb light energy from the sun. This green pigment, found in the chloroplasts of plant cells, specifically absorbs light in the blue and red wavelengths while reflecting green, which is why plants appear green. By capturing solar energy, chlorophyll facilitates the conversion of carbon dioxide and water into glucose and oxygen, enabling plants to produce their own food and release oxygen as a byproduct. This process is foundational for life on Earth, supporting the entire food web.