permittivity of vacuum 

https://doi.org/10.1351/goldbook.P04508
Fundamental physical constant ε0=1μ0 c02 exactly, where μ0 is the permeability of vacuum and c0 the speed of light in vacuum. It is equal to 8.854 187 817...× 10−12 F m−1.
Sources:
CODATA 2006 [Terms] [Book]
Green Book, 2nd ed., p. 14 [Terms] [Book]
Citation: 'permittivity of vacuum' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04508 RIS BibTex EndNote
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Last revised: February 24, 2014