• Vacuum permittivity, commonly denoted ε0 (pronounced "epsilon nought" or "epsilon zero"), is the value of the absolute dielectric permittivity of classical...
    17 KB (2,221 words) - 18:11, 12 September 2024
  • Thumbnail for Permittivity
    In electromagnetism, the absolute permittivity, often simply called permittivity and denoted by the Greek letter ε (epsilon), is a measure of the electric...
    34 KB (4,420 words) - 22:30, 9 September 2024
  • Thumbnail for Relative permittivity
    permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of a vacuum....
    16 KB (2,033 words) - 11:05, 16 October 2024
  • was called the permeability of vacuum. Another, now rather rare and obsolete, term is "magnetic permittivity of vacuum". See, for example, Servant et...
    16 KB (2,108 words) - 02:58, 3 October 2024
  • Thumbnail for Quantum vacuum state
    term in the vacuum, resulting in a field-dependent electrical permittivity ε deviating from the nominal value ε0 of vacuum permittivity. These theoretical...
    25 KB (2,747 words) - 20:05, 20 September 2024
  • Thumbnail for Speed of light
    between c and the vacuum permittivity ε0 and vacuum permeability μ0 established by Maxwell's theory: c2 = 1/(ε0μ0). The vacuum permittivity may be determined...
    145 KB (15,360 words) - 17:24, 8 October 2024
  • Thumbnail for Maxwell's equations
    0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity and μ 0 {\displaystyle \mu _{0}} the vacuum permeability. The equations have two major...
    75 KB (7,916 words) - 22:20, 5 October 2024
  • Thumbnail for Vacuum
    dielectric permittivity of the vacuum of classical electromagnetism is changed. For example, see Zeidler, Eberhard (2011). "§ 19.1.9 Vacuum polarization...
    67 KB (7,592 words) - 11:38, 3 October 2024
  • type of ordinal number ε0, in physics, vacuum permittivity, the absolute dielectric permittivity of classical vacuum E0 (cipher), a cipher used in the Bluetooth...
    1 KB (171 words) - 13:18, 30 July 2024
  • Thumbnail for Permeability (electromagnetism)
    coined by William Thomson, 1st Baron Kelvin in 1872, and used alongside permittivity by Oliver Heaviside in 1885. The reciprocal of permeability is magnetic...
    23 KB (2,125 words) - 14:10, 8 October 2024
  • Thumbnail for Poynting vector
    fields E and B, without a built-in model of material media. Only the vacuum permittivity and permeability are used, and there is no D or H. When this model...
    34 KB (4,658 words) - 19:45, 8 October 2024
  • mass, ħ is the reduced Planck constant, and ε0 is the vacuum permittivity. The vacuum permittivity ε0 is implicitly used as a nondimensionalization constant...
    19 KB (1,624 words) - 06:38, 15 August 2024
  • where εSiO2 = 3.9 is the relative permittivity of silicon dioxide ε0 = 8.854×10−12 F/m is the vacuum permittivity tox is the oxide thickness. A. P. Godse;...
    2 KB (323 words) - 21:36, 21 May 2024
  • in which c = 1 and ħ = 1. A similar choice can be applied to the vacuum permittivity, ε0. One could eliminate either the metre or the second by setting...
    10 KB (1,208 words) - 22:27, 9 September 2024
  • Thumbnail for Electromagnetic field
    change by switching the permeability and permittivity of free space with the permeability and permittivity of the linear material in question. Inside...
    22 KB (2,561 words) - 09:55, 16 October 2024
  • Thumbnail for Zero-point energy
    electronic charge and ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity)) we can form a dimensionless quantity called the fine-structure...
    209 KB (26,939 words) - 22:03, 6 October 2024
  • Thumbnail for Bjerrum length
    constant of the medium and ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity. For water at room temperature ( T ≈ 293  K {\displaystyle T\approx...
    3 KB (317 words) - 07:32, 10 December 2022
  • where n is the refractive index; c is the speed of light in vacuum; ε0 is the vacuum permittivity. For non-monochromatic waves, the intensity contributions...
    7 KB (961 words) - 07:31, 8 October 2024
  • Thumbnail for Magnetic field
    where J is the complete microscopic current density, and ε0 is the vacuum permittivity. As discussed above, materials respond to an applied electric E field...
    105 KB (12,968 words) - 00:09, 19 October 2024
  • : 349  In 1973 McWeeny extended the system of Shull and Hall by adding permittivity in the form of ⁠ κ 0 = 4 π ϵ 0 {\displaystyle \kappa _{0}=4\pi \epsilon...
    24 KB (2,367 words) - 14:25, 17 October 2024
  • Thumbnail for Electric displacement field
    } where ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity (also called permittivity of free space), and P is the (macroscopic) density of...
    11 KB (1,649 words) - 12:50, 15 July 2024
  • propagation; c is the speed of light in vacuum; μ0 is the vacuum permeability; ε0 is the vacuum permittivity; c = 1 ε 0 μ 0 {\textstyle c={\frac {1}{\sqrt...
    8 KB (1,120 words) - 22:51, 29 September 2024
  • Thumbnail for Electric field
    {\displaystyle \mu _{0}} is the vacuum permeability, and ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity. Both the electric current density...
    43 KB (5,495 words) - 11:59, 24 September 2024
  • \epsilon } epsilon permittivity farad per meter (F/m) strain unitless ε 0 {\displaystyle \varepsilon _{0}} epsilon nought Vacuum permittivity farad per meter...
    20 KB (82 words) - 21:57, 4 April 2024
  • Thumbnail for Electrostatics
    induction, separation of charges due to electric fields. Permittivity and relative permittivity, the electric polarizability of materials. Quantisation...
    18 KB (2,508 words) - 23:28, 5 October 2024
  • Thumbnail for Direct and indirect band gaps
    ϵ 0 {\displaystyle \epsilon _{0}} is the vacuum permittivity λ 0 {\displaystyle \lambda _{0}} is the vacuum wavelength for light of frequency ν {\displaystyle...
    11 KB (1,578 words) - 21:57, 2 October 2024
  • Thumbnail for Electromagnetic radiation
    speed of light in vacuum. Thus Maxwell's equations connect the vacuum permittivity ε 0 {\displaystyle \varepsilon _{0}} , the vacuum permeability μ 0 {\displaystyle...
    82 KB (9,691 words) - 06:34, 16 October 2024
  • Thumbnail for Potential energy
    {r}} } is a vector of length 1 pointing from Q to q and ε0 is the vacuum permittivity. The work W required to move q from A to any point B in the electrostatic...
    44 KB (6,122 words) - 11:00, 4 October 2024
  • formula reads, in SI units: where c is the speed of light and ε0 the vacuum permittivity, β = v c {\displaystyle \beta ={\frac {v}{c}}} , e and me the electron...
    8 KB (947 words) - 12:25, 24 June 2024
  • Spontaneous emission Quantum fluctuation Quantum vacuum state QCD vacuum QED vacuum Vacuum Vacuum permittivity Vacuum Rabi oscillation Spinoza's Ethics and De...
    10 KB (1,399 words) - 04:01, 1 September 2024