Surge velocity of propagation

The surge velocity or phase velocity of a wave is the rate at which the phase of the wave propagates in space.

Symbol
$c_{SI}$
Unit
km/s
Formulae
$\frac{1}{1000 \sqrt{\epsilon_{i}} \sqrt{\epsilon_{0} \mu_{0}}}$
Related
$\epsilon_{0}$
$\mu_{0}$