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Questions and Answers
Sky wave propagation allows radio waves to travel through the Earth's atmosphere and can reflect off the ionosphere.
Sky wave propagation allows radio waves to travel through the Earth's atmosphere and can reflect off the ionosphere.
True (A)
Sky wave propagation is ineffective at frequencies above 30 MHz.
Sky wave propagation is ineffective at frequencies above 30 MHz.
True (A)
Sky wave propagation cannot occur at night due to the absence of solar radiation.
Sky wave propagation cannot occur at night due to the absence of solar radiation.
False (B)
High-frequency (HF) bands utilize sky wave propagation for long-range communication.
High-frequency (HF) bands utilize sky wave propagation for long-range communication.
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Sky wave propagation is influenced by atmospheric conditions such as temperature and humidity.
Sky wave propagation is influenced by atmospheric conditions such as temperature and humidity.
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Study Notes
Sky Wave Propagation
- Facilitates radio wave travel through the Earth's atmosphere with the ability to reflect off the ionosphere.
- Ineffective at frequencies exceeding 30 MHz, limiting its utility for higher frequency communications.
- Does not occur at night as the lack of solar radiation depletes the ionosphere's capability to reflect waves.
- High-frequency (HF) bands, typically ranging from 3 MHz to 30 MHz, employ sky wave propagation for effective long-range communication.
- Influenced by atmospheric conditions, such as temperature and humidity, which can affect signal strength and quality during transmission.
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