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Radio is the technology of signaling and communicating using radio waves. Consider using the rf (radio frequency) tag.
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Radio Waves: Spark gaps vs general wireless radio antennas?
I was recently told by a friend who teaches college physics that "in reality radio waves are only generated when an electric current is made to move violently through a conductor". … He went on to elaborate how this works with normal radio antennas, WiFi, etc. but honestly it went over my head. …