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'''Radio waves''' are a part of the electromagnetic spectrum. They typically defined as having wavelengths longer than about a centimetre, though this value depend on the definition. Therefore radio waves have the longest wavelength and lowest energy of any type of electromagnetic radiation. They are generally used for communication.
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'''Radio waves''' are a part of the electromagnetic spectrum. They typically defined as having wavelengths longer than about a centimetre, though this value depend on the definition. Therefore, radio waves have the longest wavelength and lowest energy of any type of electromagnetic radiation. They are generally used for communication.