Three waves A, B and C of frequencies 1600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communication ______.

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Three waves A, B and C of frequencies 1600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communication a is transmitted via ground wave, B via sky wave and C via space wave. Explanation: The radio waves emitted from a transmitter antenna can reach the receiver antenna by the following mode of operation. • Ground wave propagation • Sky wave propagation • Space wave propagation Mode of communication frequency range: 1. Ground wave propagation – 500 kHz to 1710 kHz 2. Sky wave propagation – 2 MHz to 40 MHz 3. Space wave propagation – 54 MHz to 42 GHz So, A is transmitted via ground wave, B via sky wave and C via space wave.

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