Electric-to-magnetic field ratio in EM plane wave (vacuum) (E₀/B₀ = c (magnitudes in vacuum))

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E₀/B₀ = c (magnitudes in vacuum)

What each symbol means

SymbolWhat it stands for
cSpeed of light in vacuum (m/s)
B₀Peak magnetic field magnitude (T)
E₀Peak electric field magnitude (V/m)

When to use this

Plane electromagnetic wave in vacuum; E, B perpendicular to each other and to propagation.