Which band of frequency is suitable for communication over great distances?
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Answer:
Most of the long distance communication results from ionisation of the F layer, the most applicable radio bands in the High Frequency being 3.5 MHz, 7 MHz, 14 MHz and 21 MHz.
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A low-frequency band is suitable for communication over great distances.
- This band is suitable because of its long wavelength. It can diffract over any kind of obstacles to reach its targeted destination.
- Low-frequency waves can be transmitted up to 2000 km from the antenna.
- Its frequency ranges from 30 to 300 kHz. It is also known as the kilometer band.
- It is very useful for military purposes along with meteorological forecasting and broadcasting radio.
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