characteristic impedance of vacuum (Ohms)
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Z0=|E||H|=376.730313461Ω
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characteristic impedance of vacuum
This constant is the characteristic impedance of a vacuum, the universal constant typically referenced as Z0. It is also known as the impedance of free space or even more precisely as wave-impedance of a plane wave in free space.
This constant,Z0, relates the magnitude of the electric field strength, |E|, to the magnitude of the magnetic field strength, |H|, for electromagnetic radiation traveling through a vacuum.
Notes
The constant Z0 is the product of two exactly-known constant values:
- the vacuum permiability, μ0
- the speed of light in a vacuum, c
And thus the characteristic impedance of vacuum is exactly known
This equation, characteristic impedance of vacuum (Ohms), references 2 pages
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