Permitivity, and relative permitivity

[neu]

Homework Statement

For a plane em wave in vacuum can write k=\frac{w}{c}

what is the equivalent relation in a dielectric?

Homework Equations

\frac{1}{c^2}={\epsilon}{\mu}

The Attempt at a Solution

k=\sqrt{{\epsilon_{r}}\epsilon\mu}.w

This right?

 

[Meir Achuz]

Yes, but you could keep the c instead of epsilon0 and mu0.

 

[neu]

ok so: \frac{1}{c}=\sqrt{\epsilon_{0}\mu_{0}}

so how is \epsilon and \mu related to c?

is it \frac{n}{c}=\sqrt{\epsilon\mu}?

 

[Meir Achuz]

ok so: \frac{1}{c}=\sqrt{\epsilon_{0}\mu_{0}}

so how is \epsilon and \mu related to c?

is it \frac{n}{c}=\sqrt{\epsilon\mu}?

Yes, if you mean \epsilon=\epsilon_r\epsilon_0.