Electric-Magnetic Field Ratio in EM Wave (E₀/B₀ = c)

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E₀/B₀ = c

What each symbol means

SymbolWhat it stands for
c3×10⁸ m/s
B₀Magnetic field amplitude (T)
E₀Electric field amplitude (V/m)

When to use this

In vacuum. E⊥B⊥k̂. In phase. c=1/√(μ₀ε₀).