Classical electron radius explained

The classical electron radius is a theoretical concept used to describe the size of an electron in classical physics. It is derived from the electron's charge and mass, assuming that the electron is a point charge surrounded by a spherical shell of charge. This concept is important in understanding various physical phenomena, although it is not directly applicable to quantum mechanics.

Symbol

The symbol for the classical electron radius is re.

Origin

The classical electron radius was first introduced by J.J. Thomson in the late 19th century as part of his "plum pudding" model of the atom. This model posited that atoms were composed of a positively charged sphere with electrons embedded within it. The classical electron radius was derived from the idea that an electron could be treated as a small sphere of charge.

Comparison with Quantum Mechanics

While not directly applicable to modern quantum mechanics, it remains a useful concept for understanding certain classical electromagnetic phenomena. In quantum mechanics, the electron is not considered to have a definite radius but rather a probability distribution described by wave functions. The classical electron radius serves as a historical and conceptual bridge between classical and quantum theories, highlighting the limitations of classical physics in describing subatomic particles.

How do I convert classical electron radius to other length units?

Use the links below for easy conversions from classical electron radius to other length units available on this website.