quantum
The word quantum comes from the Latin quantum, meaning "how many", on behalf of "a considerable amount of a substance." The concept of quantum used in physics refers to an indivisible basic individual. For example, "the quantum of light" is the unit of light. And the extension of the quantum mechanics, quantum optics, etc. have become a different professional research field. Its basic concept for all tangible properties is "quantifiable". "Quantization" means that the value of its physical quantity is specific, not any value. For example, in the (resting state) atoms, the energy of electrons is quantifiable. This determines the stability of atoms and general problems. In the first half of the twentieth century, new concepts emerged. Many physicists see quantum mechanics as the basic theory of understanding and describing nature. In the quantum appeared in the world for more than 100 years, after Planck, Einstein, Stephen Hawking and other scientists unremitting efforts, has initially established quantum mechanics theory. ...