Electron Radius (Classical) to Kiloparsec Converter
Unit Converter
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32 units available
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How to Convert Electron Radius (Classical) to Kiloparsec
To convert to meters: multiply by 2.8179403262 × 10⁻¹⁵.
re = e²/(4πε₀mec²) ≈ 2.8179 × 10⁻¹⁵ m, where e is electron charge and me is electron mass.
For example, 1 Electron Radius (Classical) (re) = 9.132256e-35 Kiloparsec (kpc).
Electron Radius (Classical) to Kiloparsec — Common Values
| Electron Radius (Classical) (re) | Kiloparsec (kpc) |
|---|---|
| 0.1 | 9.132256e-36 |
| 0.5 | 4.566128e-35 |
| 1 | 9.132256e-35 |
| 2 | 1.826451e-34 |
| 5 | 4.566128e-34 |
| 10 | 9.132256e-34 |
| 25 | 2.283064e-33 |
| 50 | 4.566128e-33 |
| 100 | 9.132256e-33 |
| 500 | 4.566128e-32 |
| 1000 | 9.132256e-32 |
About Electron Radius (Classical) (re)
Definition
The classical electron radius is a theoretical length scale derived from the electron's charge and mass, approximately 2.818 × 10⁻¹⁵ meters.
Mathematical Relationship
re = e²/(4πε₀mec²) ≈ 2.8179 × 10⁻¹⁵ m, where e is electron charge and me is electron mass.
Conversion Formula
To convert to meters: multiply by 2.8179403262 × 10⁻¹⁵.
Practical Applications
Used in calculating X-ray and gamma-ray scattering probabilities off electrons (Thomson and Compton scattering).
Interesting Facts
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.
Common Mistakes
Assuming this is the actual physical size of the electron — quantum mechanics shows the electron has no measurable size.
Educational Tips
Think of it as the scale at which classical electromagnetic self-energy equals the electron's mass-energy.
About Kiloparsec (kpc)
Definition
The kiloparsec is equal to 1,000 parsecs, approximately 3,262 light-years, used for measuring distances within galaxies.
Mathematical Relationship
1 kpc = 1,000 pc = 3,261.6 ly = 3.0857 × 10¹⁹ m.
Conversion Formula
To convert kpc to light-years: multiply by 3,261.6. To convert kpc to pc: multiply by 1,000.
Practical Applications
Mapping spiral arm structures, locating star clusters, and describing galactic halo dimensions.
Interesting Facts
The Milky Way disk is about 30 kpc in diameter. The Sun orbits the galactic center at a distance of ~8.2 kpc.
Common Mistakes
Forgetting the factor of 1,000: 1 kpc = 1,000 pc, not 100 pc.
Educational Tips
Think of kpc as the 'kilometer' of galaxy mapping — most features within a galaxy are measured in kpc.