Changes

'''Compton Scattering''' is the collision process between a [[X-ray]] or a [[gamma ray]] and a bound atomic electron where only part of the  energy of the electromagnetic ray is transferred to the electron.  

'''Compton Scattering''' is the collision process between a [[X-ray]] or a [[gamma ray]] and a bound atomic electron where only part of the  energy of the electromagnetic ray is transferred to the electron.  

The effect was at first observed by  [[Arthur Holly Compton]] in 1923 at Washington University in St. Louis. Compton was rewarded the 1927 [[Nobel Prize]] in Physics for this discovery.

The effect was at first observed by  [[Arthur Holly Compton]] in 1923 at Washington University in St. Louis and explained in his article ''"A Quantum Theory of the Scattering of X-ray by Light Elements"''<ref>Arthur H. Compton: ''A Quantum Theory of the Scattering of X-ray by Light Elements'', The Physical Review, Vol. 21, No. 5, May, 1923</ref>. Compton was rewarded the 1927 [[Nobel Prize]] in Physics for this discovery.

Arthur H. Compton ''treated the x-ray photons as particles and applied conservation of energy and conservation of momentum to the collision of a photon with a stationary electron.''<ref>[http://hyperphysics.phy-astr.gsu.edu/Hbase/quantum/compeq.html#c1 Compton Scattering Equation], ''Hyperphysics'', C. R. Nave, Georgia State University</ref>. He used  the [[Planck]] relationship and the [[E=mc²|relativistic energy expression]] to derive the ''standard Compton formula'':

[[File:Compton Scattering Diagram.png|thumb|246px|right]]Arthur H. Compton ''treated the x-ray photons as particles and applied conservation of energy and conservation of momentum to the collision of a photon with a stationary electron.''<ref>[http://hyperphysics.phy-astr.gsu.edu/Hbase/quantum/compeq.html#c1 Compton Scattering Equation], ''Hyperphysics'', C. R. Nave, Georgia State University</ref>. He used  the [[Planck]] relationship and the [[E=mc²|relativistic energy expression]] to derive the ''standard Compton formula'':

<math>\Delta \lambda = \frac{h}{m_e c} (1-\cos \theta)</math>

<math>\Delta \lambda = \frac{h}{m_e c} (1-\cos \theta)</math>