• Thumbnail for Relative permittivity
    The relative permittivity (in older texts, dielectric constant) is the permittivity of a material expressed as a ratio with the electric permittivity of...
    16 KB (2,054 words) - 20:31, 27 May 2025
  • 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 (4,456 words) - 16:42, 26 June 2025
  • Vacuum permittivity, commonly denoted ε0 (pronounced "epsilon nought" or "epsilon zero"), is the value of the absolute dielectric permittivity of classical...
    17 KB (2,250 words) - 13:35, 6 June 2025
  • Thumbnail for Refractive index
    the absolute permeability and permittivity of the medium, εr is the material's relative permittivity, and μr is its relative permeability. In non-magnetic...
    82 KB (9,202 words) - 19:42, 22 June 2025
  • Thumbnail for Curie temperature
    Curie–Weiss law applies to the dielectric constant, also known as the relative permittivity: ϵ = ϵ 0 + C T − T 0 . {\displaystyle \epsilon =\epsilon _{0}+{\frac...
    48 KB (4,937 words) - 15:13, 4 June 2025
  • 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 (2,119 words) - 19:19, 13 May 2025
  • Thumbnail for Dielectric
    polarisability. The latter is expressed by a number called the relative permittivity. Insulator is generally used to indicate electrical obstruction...
    37 KB (4,775 words) - 01:49, 26 May 2025
  • Thumbnail for Exciton
    Coulomb forces are screened in a crystal, which is expressed as a relative permittivity εr significantly larger than 1 and (b) the Effective mass of the...
    37 KB (4,830 words) - 22:08, 19 June 2025
  • Thumbnail for Lead zirconate titanate
    electric field is applied (useful for actuator applications). The relative permittivity of lead zirconate titanate can range from 300 to 20000, depending...
    13 KB (1,249 words) - 16:11, 21 May 2025
  • measurement of skin hydration. It uses a capacitive sensor to measure the relative permittivity of upper skin layers. Because these depend on hydration of skin...
    1 KB (96 words) - 06:37, 6 January 2024
  • Thumbnail for Vacuum
    fluctuations can produce transient virtual particle densities and a relative permittivity and relative permeability that are not identically unity. In the theory...
    67 KB (7,590 words) - 00:01, 13 June 2025
  • breakdown (D48/50) > 50 kV Dielectric strength 20 MV/m Relative permittivity (A) 4.4 Relative permittivity (D24/23) 4.4 Dissipation factor (A) 0.017 Dissipation...
    8 KB (630 words) - 20:16, 16 March 2025
  • _{r}/(\epsilon _{r}+2)} where ϵ r {\displaystyle \epsilon _{r}} is the relative permittivity. Low charges on nanoparticles and microparticles are stable over...
    2 KB (194 words) - 08:19, 27 January 2022
  • Thumbnail for Brendel–Bormann oscillator model
    mathematical formula for the frequency dependence of the complex-valued relative permittivity, sometimes referred to as the dielectric function. The model has...
    10 KB (1,074 words) - 23:24, 22 May 2025
  • Thumbnail for Bjerrum length
    \varepsilon _{r}} is the relative dielectric constant of the medium and ε 0 {\displaystyle \varepsilon _{0}} is the vacuum permittivity. For water at room temperature...
    3 KB (317 words) - 07:28, 28 May 2025
  • Thumbnail for Tauc–Lorentz model
    mathematical formula for the frequency dependence of the complex-valued relative permittivity, sometimes referred to as the dielectric function. The model has...
    8 KB (1,217 words) - 17:53, 23 May 2025
  • Thumbnail for Superheated water
    the degree of alignment is measured by the relative permittivity. Water has a high relative permittivity of about 80 at room temperature; because polarity...
    24 KB (2,736 words) - 04:20, 11 July 2024
  • frequently given as dimensionless constants; relative permittivity: ϵ r {\displaystyle \epsilon _{\text{r}}} and relative permeability: μ r {\displaystyle \mu...
    45 KB (5,383 words) - 02:13, 19 April 2025
  • area, 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....
    2 KB (323 words) - 21:36, 21 May 2024
  • Thumbnail for Mie scattering
    of relative permittivity and permeability much greater than one and close to each other; two different dielectric particles with equal permittivity but...
    58 KB (9,240 words) - 15:57, 24 May 2025
  • (subtractive metallization, direct metal etch); Air gaps to further reduce relative permittivity of intermetal dielectric and, therefore, interconnect capacitance;...
    31 KB (2,581 words) - 13:43, 28 June 2025
  • Mossotti and Rudolf Clausius, expresses the dielectric constant (relative permittivity, εr) of a material in terms of the atomic polarizability, α, of...
    8 KB (1,099 words) - 22:35, 23 May 2025
  • Thumbnail for Surface plasmon resonance
    vector, ε {\displaystyle \varepsilon } is the relative permittivity, and μ {\displaystyle \mu } is the relative permeability of the material (1: the glass...
    30 KB (3,654 words) - 16:17, 8 June 2025
  • Thumbnail for Wavenumber
    defined for a medium with complex-valued relative permittivity ε r {\displaystyle \varepsilon _{r}} , relative permeability μ r {\displaystyle \mu _{r}}...
    15 KB (1,940 words) - 20:14, 4 June 2025
  • Thumbnail for Electrostatics
    induction, separation of charges due to electric fields. Permittivity and relative permittivity, the electric polarizability of materials. Quantization...
    19 KB (2,620 words) - 09:32, 20 June 2025
  • Thumbnail for Displacement current
    the permittivity ε = ε 0 ε r {\displaystyle \varepsilon =\varepsilon _{0}\,\varepsilon _{\mathrm {r} }} is the product of: ε0, the permittivity of free...
    29 KB (3,856 words) - 17:23, 17 April 2024
  • Thumbnail for Sapphire
    Insoluble Other characteristics Coefficient of thermal expansion (5.0–6.6)×10−6/K [citation needed] relative permittivity at 20 °C ε = 8.9–11.1 (anisotropic)...
    79 KB (7,850 words) - 18:17, 5 July 2025
  • Thumbnail for Photonic crystal
    a metamaterial and vacuum. If the metamaterial is such that the relative permittivity and permeability follow the same wavelength dependence, then the...
    59 KB (6,991 words) - 19:47, 23 June 2025
  • Thumbnail for Dielectric heating
    εr″ is the imaginary part of the complex relative permittivity of the absorbing material, ε0 is the permittivity of free space and E the electric field...
    19 KB (2,397 words) - 04:11, 28 May 2025
  • Thumbnail for Precipitation (chemistry)
    precipitation in changing the nature of the solvent or the value of its relative permittivity (e.g., by replacing water by ethanol), or by increasing the ionic...
    12 KB (1,307 words) - 15:52, 24 June 2025