• The classical electron radius is a combination of fundamental physical quantities that define a length scale for problems involving an electron interacting...
    6 KB (911 words) - 01:22, 6 June 2025
  • radius (⁠ a 0 {\displaystyle a_{0}} ⁠) is a physical constant, approximately equal to the most probable distance between the nucleus and the electron...
    7 KB (1,009 words) - 14:03, 23 July 2025
  • Thumbnail for Electron
    mechanics; in reality, the so-called classical electron radius has little to do with the true fundamental structure of the electron. There are elementary particles...
    155 KB (15,851 words) - 08:43, 12 July 2025
  • Uncertainty. NIST. May 2024. Retrieved 2024-05-18. "2022 CODATA Value: classical electron radius". The NIST Reference on Constants, Units, and Uncertainty. NIST...
    32 KB (1,713 words) - 16:38, 26 September 2024
  • Thumbnail for Pair production
    fine-structure constant, r e {\displaystyle r_{\text{e}}} is the classical electron radius, Z {\displaystyle Z} is the atomic number of the material, and...
    11 KB (1,400 words) - 12:51, 22 July 2025
  • Dirac membrane (category Electron)
    {\displaystyle 0.75r_{e}} , where r e {\displaystyle r_{e}} is the classical electron radius. Using Bohr–Sommerfeld quantisation condition for the Hamiltonian...
    7 KB (1,529 words) - 16:20, 4 October 2024
  • _{T}}}=r_{\text{e}}} , where r e {\displaystyle r_{\text{e}}} is the classical electron radius, to convert it back to a unit of length. The Mott–Bethe formula...
    5 KB (742 words) - 05:28, 28 May 2025
  • Thumbnail for Klein–Nishina formula
    ^{2}(\theta )\right]} where r e {\displaystyle r_{e}} is the classical electron radius (~2.82 fm, r e 2 {\displaystyle r_{e}^{2}} is about 7.94 × 10−30...
    9 KB (1,509 words) - 08:18, 4 May 2025
  • Thumbnail for Hydrogen atom
    where a 0 {\displaystyle a_{0}} is the Bohr radius and r 0 {\displaystyle r_{0}} is the classical electron radius. If this were true, all atoms would instantly...
    39 KB (6,029 words) - 16:45, 25 July 2025
  • Thumbnail for Larmor formula
    system, the power radiated by a single electron can be expressed in terms of the classical electron radius and electron mass as: P = 2 3 m e r e a 2 c {\displaystyle...
    14 KB (2,555 words) - 06:09, 26 June 2025
  • Thumbnail for Orders of magnitude (length)
    2.81794 fm – classical electron radius 3 fm – approximate range-limit of the nuclear binding force mediated by mesons 7 fm – the radius of the effective...
    186 KB (17,664 words) - 14:02, 23 July 2025
  • \alpha \simeq {\tfrac {1}{137}}} ⁠). The classical electron radius is about 3 times larger than the proton radius, and is written: r e = α λ ¯ e ≃ 2.82  ...
    10 KB (1,452 words) - 01:36, 19 June 2025
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    land surveys done for the government. Astronomical measure uses: Earth radius R🜨 ≈ 6,371 km Lunar distance LD ≈ 384402 km. Average distance between the...
    13 KB (1,421 words) - 21:46, 18 July 2025
  • Thumbnail for Fine-structure constant
    characteristic lengths: the classical electron radius re, the reduced Compton wavelength of the electron ƛe, and the Bohr radius a0: re = αƛe = α2a0. In quantum electrodynamics...
    63 KB (7,119 words) - 06:07, 25 June 2025
  • Thumbnail for Refractive index
    }}} where r0 is the classical electron radius, λ is the X-ray wavelength, and ne is the electron density. One may assume the electron density is simply...
    82 KB (9,211 words) - 23:49, 22 July 2025
  • Thumbnail for Dirac large numbers hypothesis
    the classical electron radius, me is the mass of the electron, mH denotes the mass of the hypothetical particle, and rH is its electrostatic radius. The...
    17 KB (2,205 words) - 18:48, 18 July 2025
  • {\displaystyle m} ⁠ is the electron mass ⁠ m e {\displaystyle m_{\text{e}}} ⁠, of ⁠ a H {\displaystyle a_{\text{H}}} ⁠ is the Bohr radius ⁠ a 0 {\displaystyle...
    24 KB (2,370 words) - 17:37, 21 June 2025
  • one can treat the electron as a black hole and attempt to compute its radius. The Schwarzschild radius rs of a mass m is the radius of the event horizon...
    9 KB (1,167 words) - 03:25, 1 June 2025
  • \varepsilon _{0}}}{\frac {e^{2}}{m_{\mathrm {e} }c^{2}}}} is the classical electron radius. The last expression in the first equation shows that the wavelength...
    12 KB (2,087 words) - 15:24, 11 September 2024
  • Thumbnail for Renormalization
    m em {\displaystyle m_{\text{em}}} equal to the electron mass is called the classical electron radius, which (setting q = e {\displaystyle q=e} and restoring...
    57 KB (7,777 words) - 06:43, 6 July 2025
  • 44\times 10^{-7}\,{\frac {1}{T}}\ {\mbox{cm}}} electron gyroradius, the radius of the circular motion of an electron in the plane perpendicular to the magnetic...
    14 KB (2,480 words) - 00:27, 26 May 2025
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    inner electrons reduce the nuclear charge by 2. This outer electron should be at nearly one Bohr radius from the nucleus. Because the electrons strongly...
    74 KB (10,217 words) - 15:09, 25 July 2025
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    accepted value, the Bohr radius (~0.529 Å). In his model, Haas used a single-electron configuration based on the classical atomic model proposed by J...
    251 KB (27,123 words) - 20:02, 11 July 2025
  • Thumbnail for Atom
    usually described in terms of an atomic radius. This is a measure of the distance out to which the electron cloud extends from the nucleus. This assumes...
    126 KB (12,982 words) - 00:39, 17 July 2025
  • would predict. The correcting factor needed relative to classical relation is called the electron's g-factor, which is denoted ge: γ e − = μ e − ℏ / 2 =...
    16 KB (2,203 words) - 16:02, 10 June 2025
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    Point particle (category Classical mechanics)
    not be confused with the classical electron radius, which, despite the name, is unrelated to the actual size of an electron.) Test particle Brane Charge...
    10 KB (1,047 words) - 18:22, 7 March 2025
  • \epsilon _{0}c^{3}}}{\frac {\gamma ^{4}}{\rho ^{2}}}} Using the classical electron radius r e {\displaystyle r_{e}} P γ = 2 3 r e c ( m e c 2 ) 3 E 4 ρ...
    8 KB (1,580 words) - 10:33, 7 May 2025
  • Thumbnail for Cyclotron motion
    cyclotron frequency or gyrofrequency and a radius referred to as the cyclotron radius, gyroradius, or Larmor radius. For a particle with charge q {\displaystyle...
    9 KB (1,284 words) - 14:09, 5 June 2025
  • total energy of the charged particle, ρ is the radius of curvature, re the classical electron radius, e0 = mec2 the particle rest mass energy, ℏ the...
    5 KB (810 words) - 08:50, 28 May 2025
  • Field electron emission, also known as field-induced electron emission, field emission (FE) and electron field emission, is the emission of electrons from...
    124 KB (15,721 words) - 14:07, 19 July 2025