Photodegradation is the process by which a material breaks down or deteriorates due to exposure to light. This process can occur in a variety of materials, including plastics, polymers, textiles, and various organic compounds. Photodegradation can result in changes to the physical and chemical properties of the material, leading to color fading, loss of strength, and ultimately deterioration of the material. Researchers study photodegradation to understand the mechanisms involved, develop methods to prevent or slow down degradation, and improve the stability and longevity of materials exposed to light. This research area is important in industries such as packaging, textiles, and conservation of cultural artifacts.