Photo Equivalence Law

A fundamental idea linked to light-induced chemical reactions is the photochemical equivalency law, which says that one molecule of the material responds for every unit of radiation received. A quantum is an electromagnetic radiation unit with energy equal to the product of a constant (or Planck's constant - h) and the radiation frequency, which is represented by the Greek letter nu (v). Gram moles are units used in chemistry to indicate quantitative measurements of substances. An individual gramme mole is made up of 6.022140857 1023 molecules, or an Avogadro's number. The photochemical equivalency law may be rewritten as follows as a result: For each mole of the reacting substance, 6.022140857 1023 quantum of light are absorbed. It refers to the initial chemical change that results directly from the light absorption. The photochemical equivalence law will be applied to the portion of a light-induced reaction that is known to be the primary process. Typically, in most photochemical reactions, the primary reaction can be followed by "secondary reactions," which are regular interactions between the reactants and don't require light absorption. Such reactions don't seem to follow the one quantum - one single molecule reactant relationship as a result. Furthermore, this law is only applicable to conventional photochemical reactions that employ light sources of moderate intensity; high-intensity light sources, such as those used in laser experiments and flash photolysis, are referred to as producing so-called bi-photonic reactions.