Question 4:
Design a dielectric medium interface (i.e., find $\epsilon_r$ and $\eta$) for TEM
propagation. The electric field intensity in a dielectric medium ($\mu = \mu_o$)
Find
a. Dielectric constant $\epsilon_r$
b. Intrinsic impedance $\eta$
c. Magnetic field intensity
$E = 150\cos (10^9t + 8x) a_z$ V/m
d. The total power crossing 100 cm$^2$ of plane 2x + y = 5