5 A periscope consists of two 90-45-45° prisms (as shown in Figure) are made of lossless glass with n = 1.5. The reflection off the inclined planes are 100% (total

reflection per Snell's Law), i.e. | T| = 1. (a) What power(in dB) is the transmitted signal through the bottom prism relative to the input? (b) If the incoming signal has a magnetic field given by: H,(x,t) = 23.77 sin(10“t– kx)mA/m, what is the first reflected E-field? What is k?(Final B FI9)