We’ve all see those tall antennas on top of cop cars or on older cars. But i never understood how it worked or whats in them. Are they literally just a long flexible wire? Does the signal emit from the top or throughout the length of the wire?
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You’re actually spot on, a radio wave is just an electromagnetic wave on a specific frequency, which is created every time you run electricity through a wire (also a magnetic wave). All a transmitter does is turn sound/data into electricity,then into a wave, and all a receiver does is turn a wave into electricity that gets converted into sound or data. The frequency of the wave is inverse (opposite) to the length of the wave so it does use the entirety of the wire.
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