If there are lots of different radio signals with the same or very similar wavelengths, how is it possible for a radio to pick up just one signal?
In: Technology
Radio is based on oscillating waves. AKA differing frequencies that spike at different intervals on a graph. Some are really steep like a switchback while others are very shallow like a wandering path into a valley. The “steepness” or “frequency” of the wave pattern can be intercepted by an antenna tuned to the same pattern. These levels of steepness have been turned into numbers which then are indicated by your FM/AM radio dials and can fine tune into a single frequency being broadcast. Interference is a different story.
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