Radiation reaction

In the physics of electromagnetism, the Abraham–Lorentz force (also Lorentz–Abraham force) is the recoil force on an accelerating charged particle caused by the particle emitting electromagnetic radiation. It is also called the radiation reaction force, radiation damping force or the self-force.The formula predates the theory of special relativity and is not valid at velocities close to the speed of light. [Source: Wikipedia ]