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Jan 25, 2022**

### Physicist solves century old problem of radiation reaction

##### Posted by Genevieve Klien in categories: mathematics, particle physics

A Lancaster physicist has proposed a radical solution to the question of how a charged particle, such as an electron, responded to its own electromagnetic field.

This question has challenged physicists for over 100 years but mathematical physicist Dr. Jonathan Gratus has suggested an alternative approach—published in the *Journal of Physics A: Mathematical and Theoretical* with controversial implications.

It is well established that if a point charge accelerates it produces electromagnetic radiation. This radiation has both energy and momentum, which must come from somewhere. It is usually assumed that they come from the energy and momentum of the charged particle, damping the motion.