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G3B05
How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?
Pick an answer to check it.
Answer: A. They are refracted back to Earth
Frequencies between the LUF and the MUF are refracted back to Earth by the ionosphere. Above the MUF they pass through, and below the LUF they are absorbed.
Tip: Between LUF and MUF, signals come back.