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An epsilon with a zero subscript, in every electrostatic formula.
Also known as: Electric constant, Epsilon nought
The electric constant appears in Coulomb's law and in every capacitance formula. Since the 2019 redefinition of the SI it is a measured quantity rather than an exactly defined one, which reversed its former status.
Denotes the electric constant of free space, appearing in Coulomb's law and in capacitance relations.
Contexts: Laboratory
Became a measured rather than an exactly defined quantity in the 2019 SI redefinition, reversing its previous status.
Contexts: Laboratory
A small rounded Greek letter with a horizontal middle bar, followed by a small zero at its foot.