Matches in DBpedia 2014 for { ?s ?p Radio is the radiation (wireless transmission) of electromagnetic signals through the atmosphere or free space. While the term 'radio-' is actually the combining form of radiant (radioactive, radiotherapy), the process that was originally called radiotelegraphy has become so common that it is nearly always called just 'radio' and the associated electromagnetic waves are called radio waves. In practice, the frequency of radio signals are significantly below that of visible light (in the radio frequency range) from about 3 kHz to 300 GHz.Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.. }
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- Radio abstract "Radio is the radiation (wireless transmission) of electromagnetic signals through the atmosphere or free space. While the term 'radio-' is actually the combining form of radiant (radioactive, radiotherapy), the process that was originally called radiotelegraphy has become so common that it is nearly always called just 'radio' and the associated electromagnetic waves are called radio waves. In practice, the frequency of radio signals are significantly below that of visible light (in the radio frequency range) from about 3 kHz to 300 GHz.Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.".