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radio waves




electromagnetic spectrum
The electromagnetic spectrum
Credit: CSIRO Australia

Radio waves are electromagnetic radiation of wavelengths longer than about 1 millimeter (corresponding to a frequency of 30 GHz). The shortest radio waves, from about 1 mm to 30 cm, are known as microwaves; the longest detected are about 30 meters long (10 MHz) but, in theory, could have a wavelength of 1 kilometer or more.


Related categories

   • WAVES AND WAVE PHENOMENA
   • RADIO ASTRONOMY AND COMMUNICATIONS