Which among the following waves is used for communication by artificial satellites ? (a)Microwaves (b)Radio waves (c)A. M. (d)Frequency of 101 series
option A. For fixed (factor-to-factor) services, communications satellites offer a microwave radio relay era complementary to that of verbal exchange cables. They also are used for cell packages including communications to ships, vehicles, planes and hand held terminals, and for TV and radio broadcasting. Microwave era is appreciably used for factor-to-factor telecommunications (i.e., non broadcast uses).
