TF/SF method in FDFD. Similarly, the total-field / scattered-field formulation is of great importance in the FDFD method, since it is the only way to separate scattered fields from incident fields. Derive a TF/SF method in FDFD. Start by using the wave equation update, Equation (14.5), and then make the correct modifications near the TF/SF boundary, referring to Figure 7.3. For a single TF/SF boundary, how does this modify the matrix M?
