Radio waves
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Who discovered radio waves?
Radio waves were discovered by German physicist Heinrich Hertz in 1887.
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What did Heinrich Hertz demonstrate about radio waves?
Heinrich Hertz showed that radio waves, like light, propagate at high speeds, diffract, and refract.
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Who was the first to create a radio device?
Italian physicist Guglielmo Marconi was the first to create a radio device.
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What was the first radio device called?
The first radio device was called TSF (télégraphe sans fil).
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What does the unit "hertz" (Hz) represent?
The unit "hertz" (Hz) represents one oscillation per second.
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