Question

In a certain medium, E = 10 cos (108t — 3y) ax V/m. What type of medium is it?

Answer 1

plane waves in lossless dielectrics

In our case, we have ω=10⁸, β=3

we can write

$\frac{ω}{β} =\sqrt{\frac{1}{µε}}$

Answer

lossless dielectrics