Definition that contains photochemical
- actinometer an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)
- actinic radiation electromagnetic radiation that can produce photochemical reactions
- actinic ray electromagnetic radiation that can produce photochemical reactions
- actinism the property of radiation that enables it to produce photochemical effects
- action spectrum the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation