Correct Answer : Option (A) : increases
Explanation : Because of this reason ground waves can be used for frequencies upto about 1600 kHz only.
Correct Answer : left to right
Correct Answer : Fading
Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.
Correct Answer : 13 mm