#impedance_of_free_space
Impedance of free space
Physical constant; ratio of electric to magnetic field strength in a vacuum
In electromagnetism, the impedance of free space, Z0, is a physical constant relating the magnitudes of the electric and magnetic fields of electromagnetic radiation travelling through free space. That is, where |E| is the electric field strength, and |H| is the magnetic field strength. Its presently accepted value isZ0 = 376.730313412(59) Ω,
Thu 12th
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