Sky Wave Propagation

Ground Wave Propagation

Space Wave Propagation

Distinguish between sky wave and space wave propagation. Give a brief description with the help of suitable diagrams indicating how these waves are propagated.

What is ground wave propagation ?

The ground wave propagation is suitable for radio waves of frequency

Draw a schematic diagram showing the (i) ground wave (ii) sky wave and (iii) space wave propagation modes for em waves. Write the frequency range for each of the following : (i) Standard AM broadcast (ii) television (iii) Satellite communication

Why ground wave propagation is not suitable for high frequency?

The maximum range of ground or surface wave propagation depends on-

A : Longitudinal waves do not exhibit the phenomenon of polarisation . R : In longitudinal waves medium particle vibrate in direction normal to the wave propagation .

What do you understand by space wave propagation? Why is it known as line of sight propagation? Explain selective fading?