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Classical Electron Radius
The classical electron radius is a theoretical length scale associated with the electron, derived from classical electromagnetism. It represents the size of a hypothetical sphere where the electron’s electrostatic energy equals its rest mass energy.
Its value is approximately 2.818 × 10⁻¹⁵ meters (about 2.8 femtometers).
Calculated using fundamental constants: the electron charge, mass, and the speed of light.
It is not the actual physical size of the electron (which is considered point-like in quantum mechanics), but a useful scale in classical physics.
Used in scattering theory and classical electron models.
Key facts:
Classical electron radius ≈ 2.818 × 10⁻¹⁵ m
Represents an electromagnetic length scale, not a physical size
Important in classical models of electron behavior
This radius helps bridge classical and quantum views of particle physics.
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