Introduction theory of energy
In 1900 Max Planck launched a bold idea that resulted began a new era in physics. While classical physicists thought that energy is continuous radiation (emitted or absorbed can in any quantity), Planck, based on the data of radiation absolutely black body proposed that radiation energy can be emitted or absorbed only in discrete amounts . The smallest amount of energy that can be emitted or absorbed in the form of electromagnetic radiation called Planck quantum (photon).
