Radio waves travel at the speed of light.
Radio waves move at the speed of light in a vacuum, as do all electromagnetic waves, and at a nearly identical but slightly slower speed in the Earth's atmosphere.
The longest wavelengths in the electromagnetic spectrum are found in radio waves, which typically have frequencies of 300 gigahertz (GHz) and lower.
Similar to light, X-rays, and other forms of radiation, radio waves are an electromagnetic radiation with much longer wavelengths.
As a result, they move much more quickly than sound itself through the air, which moves at a speed of 340 metres (1,125 feet) per second (or the speed of light, or 300,000 kilometers/186,000 miles per second).
It's simple to be deceived because when you hear the word "radio," you typically think of voices or music.
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