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n. pl. per·mit·tiv·i·ties
A measure of the ability of a material to interact with an electric field and become polarized by the field, so that the field within the material is weaker than the field in the absence of the material. The permittivity of a material is the product of the dielectric constant of the material and the permittivity of a perfect vacuum, which is defined to be about 8.854 × 10-12 farad per meter.


n, pl -ties
(General Physics) a measure of the response of a substance to an electric field, expressed as the ratio of its electric displacement to the applied field strength; measured in farads per metre. Symbol: ε See also relative permittivity, electric constant


(ˌpɜr mɪˈtɪv ɪ ti)

n., pl. -ties.
the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum.
References in periodicals archive ?
Abstract: Very simple computer-aided-design models are introduced to determine the characteristic parameters such as effective permittivities and characteristic impedances of unshielded suspended and inverted microstrip lines.
A three-layer microstrip resonator is introduced to measure complex permittivities of medium loss liquids.
The dielectric spectroscopy showed that the real and imaginary permittivities increased tremendously as the MWCNT concentration approached the percolation threshold.
Engheta and Della Giovampaola realized that instead of seeking the perfect mix of multiple materials to make a cloak or lens, scientists can simply choose two materials with opposite permittivities (one positive, one negative) to use as metamaterial bits.
Agio, "Contour-path effective permittivities for the two-dimensional finite-difference time-domain method," Optics Express, Vol.
The permittivities of the dielectric media adjacent to the metal layer, i.
In this case, the relative complex permittivities of each solid sample were deduced from a scattering matrix defined between the sample planes.
The even mode is possible in the MCML when phase velocities of electro-magnetic waves propagating along the equipotential conductors of the MCML are equal, which in turn is only possible if the effective permittivities of the conductors are equal for the even mode.
Dozens of apparent permittivities and conductivities distributed from 20 kHz to 1 GHz can be obtained by the propagation tools [14].
The relative permittivities of tooth enamel and dentine have been measured by using THz spectroscopy in [2] and have been reported as 9.
MCMLs are characterized by N effective dielectric permittivities and characteristic impedances Zki, where k is the type of a normal mode and i is the conductor number.
For surface plasmons, the effective wavelengths of the plasmons can be much less than that of the exciting EM fields due to the difference in sign of the permittivities in a metal and dielectric.