# An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2.

An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2. Its velocity in this medium is ________× 107m/s.

$$n=\sqrt{\mu_r ε_r}=2$$
$$v={c\over n}$$ =$$3×10^8\over 2$$