When an electromagnetic wave travels from transmitter to receiver, which factor/s affect/s the propagation level?
A. Curvature of earth
B. Roughness of earth
C. Magnetic field of earth
D. All of the above
Answer:A
When an electromagnetic wave travels from transmitter to receiver, which factor/s affect/s the propagation level?
A. Curvature of earth B. Roughness of earth C. Magnetic field of earth D. All of the above