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Radio waves and propagation

The properties of radio waves and the way in which they travel or propagate are of prime importance in the study of radio technology. These waves can travel over vast distances enabling communication to be made where no other means is possible. Their use enables communication to be established over distances ranging from a few metres to many thousands of miles, permitting telephone conversations and many other forms of communication to be made with people on the other side of the world using short wave propagation or satellites. Radio waves can be received over even greater distances. Radio telescopes pick up minute signals from sources many light years away.

Another property of radio waves is that they spread out in ...

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