Though chlorophyll is the major pigment responsible for trapping light, other thylakoid pigments like chlorophyll-b, xanthophylls, and carotenoids, which are called accessory pigments, also absorb light and transfer the energy to chlorophyll-a. Indeed, they not only enable a wider range of wavelengths of incoming light to be utilized for photosynthesis but also protect chlorophyll-a from photo-oxidation.