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Wave Optics
Question
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Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?

  • 10 kHZ

  • 10 MHz

  • 1 GHz

  • 1000 GHz

Answer

A.

10 kHZ

10 kHz cannot be radiated because the size of antenna is large. 1 GHz and 1000 GHz will penetrate.

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