Science glossary film: Radio waves

Radio waves

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The lowest frequency range of electromagnetic radiation, with wavelengths from millimetres to many kilometres.

The lowest frequency range of electromagnetic radiation, with wavelengths from millimetres to many kilometres. Radio waves travel very well through Earth's atmosphere, which is why they are so widely used for telecommunications. It is also why radio waves, along with visible and infrared light, are the only portion of the electromagnetic spectrum used for Earth-based astronomy.

Radio waves travel very well through Earth's atmosphere, which is why they are so widely used for telecommunications. It is also why radio waves, along with visible and infrared light, are the only portion of the electromagnetic spectrum used for Earth-based astronomy.

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