What does the term Radio frequency refer to?
Q: What does the term Radio frequency refer to?
A: The term Radio frequency refers to electromagnetic radiation in the range of frequencies lower than microwaves.
Q: What are radio waves at these frequencies useful for?
A: Radio waves at these frequencies have been found useful for long-range communications.
Q: What are shortwave radio communications?
A: Shortwave radio communications operate at frequencies that can be reflected by the ionosphere and therefore can bounce around the earth.
Q: Why are longwave frequencies used for relatively short-range communications?
A: Longwave frequencies are used for relatively short-range communications such as the most ordinary of the commercial amplitude modulation (AM) radio stations.
Q: Can transmissions on longwave frequencies get long bounces?
A: Their transmissions ordinarily do not get long bounces.
Q: Are different short-wave frequencies transmitted well by long bounces around the world during times when different conditions prevail in the ionosphere?
A: Yes, different short-wave frequencies (with wavelengths shorter than 120 meters) can be reflected well and transmitted by long bounces around the world during times when different conditions prevail in the ionosphere.
Q: Why will organizations such as VOA and BBC change operating frequencies from month to month and also from time to time during a 24 hour period?
A: This is done because different short-wave frequencies can be reflected well and transmitted by long bounces around the world during times when different conditions prevail in the ionosphere.
