Photolysis is the decomposition or dissociation of a molecule caused by the absorption of light energy. The absorbed light can break chemical bonds in the molecule, leading to the formation of smaller fragments or radicals. Photolysis is involved in various chemical processes, including photodegradation of polymers and photopolymerization.

光解是由吸收光能引起的分子分解或离解。吸收的光可以破坏分子中的化学键，导致形成较小的碎片或自由基。光解涉及各种化学过程，包括聚合物的光降解和光聚合。