Question: Q. 2. Which basic mode of communication is used in satellite communication ? What type of wave propagation is used in this mode? Write, giving reason, the frequency range used in this mode of propagation.
R [2017 Delhi set-1]
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Solution:
Ans. Broadcast/point to point, mode of communication
Space wave propagation
Above $40 \mathrm{MHz}$
Because $E M$ waves, of frequency above 40 $\mathrm{MHz}$, are not reflected back by the ionosphere penetrate through the ionosphere.
[CBSE Marking Scheme, 2017]
