The primary role of chlorophyll in photosynthesis is to capture light energy from the sun. This green pigment, found in the chloroplasts of plant cells, absorbs light most efficiently in the blue and red wavelengths while reflecting green. During photosynthesis, chlorophyll facilitates the conversion of light energy into chemical energy stored in glucose, which plants use for growth and energy. This process is fundamental not only for plant life but also for producing oxygen and organic matter, forming the base of the food chain.