Fundamentals of Engineering Electromagnetics 1st Edition by David Cheng

تمرين 24

A 10-(kHz) electromagnetic wave in air with parallel polarization is incident obliquely on an ocean surface at a near-grazing angle i = 88°. Using r = 81, r = 1, and = 4 (S/m) for seawater, find (a) the angle of refraction t , (b) the transmission coefficient , and (c) the distance below the ocean surface where the field intensity has been diminished by 30 (dB).