Vacuum impedance of free space

vacuumImpedance is the characteristic impedance of electromagnetic waves in vacuum, expressed in ohms. It relates electric and magnetic field amplitudes of a freely propagating plane wave.

Use

It is useful in antenna, radiation, and field calculations. It is related to the electricConstant, magneticConstant, and speedOfLight.

Caveats

Vacuum impedance is not the resistance of a physical wire. Material wave impedance depends on the medium. Use divide only with compatible field units and distinguish impedance from conductanceQuantum.