Field and Wave Electromagnetics 2nd Edition by David Cheng

تمرين 23

A 10(kHz) parallelly polarized electromagnetic wave in air 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 T||,
(c) ( P av ) r / ( P av ) i and
(d) the distance below the ocean surface where the field intensity has been diminished by 30 (dB).