(b) A 100 MHz plane wave is propagating in a lossy medium with relative permittivity
$\epsilon_r$ = 10, conductivity $\sigma$ = 2 S/m and relative permeability $\mu_r$ = 1.
(i) Using the good conductor approximation, determine the skin depth $\delta$ and loss
tangent $\tan \delta$. Discuss the physical significance of both $\delta$'s.
(ii) Without using the good conductor approximation, calculate the propagation
constant $\gamma$ and the values of both $\delta$'s.