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The portion of the electromagnetic spectrum at lower frequencies than microwaves. The wavelengths of radio waves range from thousands of meters to 30 cm. These correspond to frequencies as low as 3 Hz and as high as 1 gigahertz. (https://www.britannica.com/science/radio-wave)
Radio waves have the longest wavelengths in the EM spectrum, according to NASA, ranging from about 1 millimeter (0.04 inches) to more than 100 kilometers (62 miles). (https://www.livescience.com/50399-radio-waves.html)
Radio waves help to convey information from one place to another, such as receiving incoming information from television and radio broadcasting networks. Radio waves are also used in radar and navigational devices placed in spacecraft, boats and planes. Long-range signals, for instance, enable astronauts to communicate with stations on Earth. Radio waves help with navigation by accepting signals from global positioning satellites, and in turn transmit information on an object's location.
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