Megameter to Electron Radius (Classical)
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How to Convert Megameter to Electron Radius (Classical)
For example, 1 Megameter (Mm) = 3.548691e+20 Electron Radius (Classical) (re).
Megameter to Electron Radius (Classical) — Common Values
| Megameter (Mm) | Electron Radius (Classical) (re) |
|---|---|
| 0.1 | 3.548691e+19 |
| 0.5 | 1.774346e+20 |
| 1 | 3.548691e+20 |
| 2 | 7.097382e+20 |
| 5 | 1.774346e+21 |
| 10 | 3.548691e+21 |
| 25 | 8.871728e+21 |
| 50 | 1.774346e+22 |
| 100 | 3.548691e+22 |
| 500 | 1.774346e+23 |
| 1000 | 3.548691e+23 |
About Electron Radius (Classical) (re)
The classical electron radius is a theoretical length scale derived from the electron's charge and mass, approximately 2.818 × 10⁻¹⁵ meters.
re = e²/(4πε₀mec²) ≈ 2.8179 × 10⁻¹⁵ m, where e is electron charge and me is electron mass.
To convert to meters: multiply by 2.8179403262 × 10⁻¹⁵.
Used in calculating X-ray and gamma-ray scattering probabilities off electrons (Thomson and Compton scattering).
Despite its name, the electron is a point particle in quantum theory — the 'classical radius' is a theoretical construct, not the electron's actual size.
Assuming this is the actual physical size of the electron — quantum mechanics shows the electron has no measurable size.
Think of it as the scale at which classical electromagnetic self-energy equals the electron's mass-energy.
