Photodissociation, photolysis, or photodecomposition's a chemical reaction in which a chemical compound's broken down by photons. It's defined as the interaction of one or more photons with one target molecule. Photodissociation isn't limited to visible light. Any photon with sufficient energy can affect the chemical bonds of a chemical compound. Since a photon's energy's inversely proportional to its wavelength, electromagnetic waves with the energy of visible light or higher, such as ultravio… (More on Photolysis)