| 单词 | relative permittivity |
| 释义 | > as lemmasrelative permittivity relative permittivity n. Physics the ratio of the permittivity of a medium to that of free space; = dielectric constant n. at dielectric adj. 2b. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > displacement > constant specific inductive capacity1838 dielectric constant1875 relative permittivity1893 permittivity of free space1938 1893 O. Heaviside Electromagn. Theory I. ii. 23 (heading) Distinction between absolute and relative permittivity or inductivity. 1955 Nature 2 Apr. 603/1 For polycrystalline material the relative permittivity falls from 45 to 3 in this dispersion region. 2006 W. Bolton Engin. Sci. (ed. 5) xiv. 161 The relative permittivity is often referred to as the dielectric constant. For a vacuum the relative permittivity is 1, for dry air close to 1. < as lemmas |
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