Recently in science class we learned about radio waves. Radio waves are the longest waves in the electromagnetic spectrum. They are the waves with the highest wave lengths and lowest frequencies. Radio waves include both broadcast waves and microwaves. Broadcast waves are those that carry signals for your television or radio. Microwaves are also radio waves. When you think of microwaves you may think they are only useful for heating up food. Well, truly microwaves can also be used for cell phone communication and radar. Radar is the system that uses reflected radio waves. They can be used to measure speed. Police men can use radars to measure the speed of other cars. In conclusion, radio waves are used everyday of our lives.
Picture - http://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Radio_waves_hazard_symbol.svg/600px-Radio_waves_hazard_symbol.svg.png
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