{"id":11764,"date":"2016-03-19T19:47:14","date_gmt":"2016-03-19T19:47:14","guid":{"rendered":"http:\/\/sitepourvtc.com\/?page_id=11764"},"modified":"2022-10-14T06:30:05","modified_gmt":"2022-10-14T06:30:05","slug":"photon","status":"publish","type":"page","link":"https:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/","title":{"rendered":"Photon – Fundamental Particle"},"content":{"rendered":"
The modern photon concept was developed (1905) by Albert Einstein<\/strong> to explain the photoelectric effect, in which he proposed the existence of discrete energy packets during the transmission of light.<\/p>\n Before Albert Einstein, notably the German physicist Max Planck<\/strong> had prepared the way for the concept by explaining that objects that emit and absorb light do so only in amounts of energy that are quantized, that means every change of energy can occur only by certain particular discrete amounts and the object cannot change the energy in any arbitrary way. The concept of the modern photon came into general use after the physicist Arthur H. Compton demonstrated (1923) the corpuscular nature of X-rays. This was the validation of Einstein’s hypothesis that light itself is quantized.<\/p>\n The term photon<\/strong> comes from Greek ph\u014dtos, “light,” and a photon is usually denoted by the symbol \u03b3 (gamma). The photons are also symbolized by h\u03bd (in chemistry and optical engineering), where h is Planck’s constant and the Greek letter \u03bd (nu) is the photon’s frequency<\/strong>. The radiation frequency is the key parameter of all photons because it determines the energy of a photon. Photons are categorized according to the energies from low-energy radio waves and infrared radiation, through visible light, to high-energy X-rays and gamma rays<\/a>.<\/p>\n <\/p>\n