The photosensitivity of diphenylamine-p-diazonium sulphate by the method of photometric curves

Abstract

The rate of a photochemical reaction is generally defined as the decrease in the number of molecules of a particular species with time and can be expressed by ‒ dn / dt = γ I A , where γ is the quantum efficiency and I A the intensity of the absorbed light in quanta per second. For thin layers of absorbing medium, i. e. layers in which the light intensity is not appreciably reduced, the value of I A is given by Beer’s and Lambert’s laws, I A = α clI ,