Question
What does MUF stand for?
Answer Options
- A) The Minimum Usable Frequency for communications between two points
- B) The Maximum Usable Frequency for communications between two points
- C) The Minimum Usable Frequency during a 24-hour period
- D) The Maximum Usable Frequency during a 24-hour period
Correct Answer: B
Explanation
MUF is the acronym for Maximum Usable Frequency. It represents the highest frequency at which the ionosphere is capable of refracting a radio wave back to Earth to complete a communication path between two specific points.
If the operating frequency exceeds the MUF for a given path, the signal will pass straight through the ionosphere into space (the critical angle has been exceeded). Like the LUF, the MUF is constantly changing based on time, season, and solar activity, and it is calculated specifically for communication between two defined points.
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