# Find wavelength from relative permittivity and frequency

If i have a EM wave with frequency 1MHZ and εr=9 in a perfect dielectric ,is it possible to find the wavelength λ and wave propagation speed ? It seems impossible to me..

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(1) $\lambda \nu = c$

(2) $c^2 = \frac{1}{\mu_0 \epsilon_r \epsilon_0}$

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A bit explanation: most materials, apart from ferromagnetic ones, have relative permeability close to 1. –  C.R. Jun 25 '12 at 1:33