Three waves A , B and C of frequencies 1600 kHz, 5MHz 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 space wave while B and C are transmitted via sky wave.

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A is transmitted via ground wave , B via sky wave and C via space wave

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B and C are transmitted via ground wave while A is transmitted via sky wave

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B is transmitted via ground wave while A and C are transmitted via space wave

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Solution

The correct option is B A is transmitted via ground wave , B via sky wave and C via space wave
Ground wave propagation is suitable for the frequencies upto 2MHz (less than few mHz)
Sky wave propagation is suitable for the sequencies upto 30 to 40MHz
The space wave propagation is suitable for the freequencies above 40MHz.

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