In the car we listen to music on the radio by tuning to a station which is a specific wave length. The antenna receives electromagnetic radio waves. The radio converts these waves into vibrations in the speaker that create sound waves we can hear.
Radio waves have the longest wavelengths in the electromagnetic spectrum. "An electromagnetic wave is characterized by its frequency and time variation of the electric and magnetic fields."
In the late 1880's Henry Hertz proved the existence of radio waves. "He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. When waves created by the sparks of the coil transmitter were picked up by the receiving antenna, sparks would jump its gap as well. Hertz showed in his experiments that these signals possessed all the properties of electromagnetic waves."
Radio waves are made by various types of transmitters. Interference in radio waves can be cause by lightening which is why the radio experiences fuzziness when in a storm. I am glad radio waves were discovered because I like to listen to music in the car.
I enjoyed this article. Thanks for sharing Jerry.
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