Electromagnetic waves

Electromagnetic wave velocity
v = c / saknis(ε*μ)

Speed ​​of light in vacuum
c = saknis(ε0*μ0)

Length of electromagnetic wave
λ = c * T

Length of electromagnetic wave
λ = c / ν

Bulk (spatial, volume) density of electromagnetic wave
ω = E*B / (v*ε0*μ0)

Length of electromagnetic wave
λ = v / ν

Radiolocation: distance
s = ct / 2