Chapter 8.4, Problem 7CQ

At the boundary, the vector sum of the tangential components of the incident and reflected electric fields has to equal the tangential component of the transmitted electric field. For ${ϵ}_{r_1}=1$ and ${ϵ}_{r_2}=16$, determine the Brewster angle and then verify the validity of the preceding statement by sketching to scale the tangential components of the three electric fields at the Brewster angle.