Question

write the topic examination fear beneficial or harmful​

Answer 1

Answer:

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