Space Wave Propagation

Sky Wave Propagation

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

Ground Wave Propagation

Sky wave propagation is used in

The sky wave propagation is suitable for radio waves of frequency

The sky wave propagation is suitable for radiowaves of frequency

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

A: When light travels from a rarer to a denser medium, it loses some speed but it doesn't imply a reduction in the energy carried by the light wave. R: Energy carried by a wave depends on the amplitude of the wave and not on the speed of wave propagation.

A wave is propagating along x-axis. The displacement of particles of the medium in z-direction at t=0 is given by : z= exp[-(x+2)^(2)] where 'x' is in meter. At t=1s, the same wave disturbance is given by z=exp[-(x-2)^(2)] . Then the wave propagation velocity is :-

Distinguish between 'sky waves' and 'space waves' modes of propagation in communication system. (a) Why is sky wave mode propagation restricted to frequencies upto 40 MHz?