In the four regions, I, II, III and IV, the electric fields are described as: Region I: E_x = E_0 sin ( kz -ω t ) Region II: E_x = E_0 Region III:…

In the four regions, I, II, III and IV, the electric fields are described as : Region I: $\displaystyle \mathrm{E}_{\mathrm{x}}=\mathrm{E}_{0} \sin (\mathrm{kz}-\omega \mathrm{t})$ Region II : $\displaystyle \mathrm{E}_{\mathrm{x}}=\mathrm{E}_{0}$ Region III : $\displaystyle \mathrm{E}_{\mathrm{x}}=\mathrm{E}_{0} \sin \mathrm{kz}$ Region IV : $\displaystyle \mathrm{E}_{\mathrm{x}}=\mathrm{E}_{0} \cos \mathrm{kz}$ The displacement current will exist in the region :