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IEVref:705-03-24ID:
Language:enStatus: Standard
Term: characteristic impedance of vacuum
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Definition: the square root Z0 of the magnetic constant μ0 divided by the electric constant ε0

Z 0 = μ 0 ε 0 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meqabaGacmGadiWaaiWabiabciaafiaakeaacaWGAbWaaSbaaSqaaiGac+gaaeqaaOGaeyypa0ZaaOaaaeaadaWcaaqaaiabeY7aTnaaBaaaleaaciGGVbaabeaaaOqaaiabew7aLnaaBaaaleaacaGGVbaabeaaaaaabeaaaaa@4269@

NOTE – In the International System of units (SI), the characteristic impedance of vacuum is equal to:

Z0 = c0 · 4π × 10−7 H/m

c0 being the velocity of electromagnetic waves in vacuum; Z0 is approximately equal to 120π Ω or 377 Ω.


Publication date:1995-09
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Internal notes:2015-12-02: Correction to formula in note proposed by Erik. See mail: <i>Z</i><sub>0</sub> = <i>c</i><sub>0</sub> &middot; 4π &times; 10<sup>&minus;7</sup> H/m. JGO

2017-06-02: Cleanup - Remove Attached Image 705-03-24.gif
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