The Total solution for NCERT class 6-12
Frequencies in the UHF rangenormally propagate by means of:
(a) Ground waves.
(b) Skywaves.
(c) Surface waves.
(d) Spacewaves.
(d)Answer:
Space waves
Owing to its high frequency, an ultra high frequency (UHF) wave can neither travel along thetrajectory of the ground nor can it get reflected by the ionosphere. Thesignals having UHF are propagated through line-of-sight communication, which isnothing but space wave propagation.