+Hertz (Hz) is the [SI unit](/wiki/SI_unit) of [frequency](/wiki/Frequency), representing one cycle per second. It is named after Heinrich Hertz, who confirmed the existence of electromagnetic waves.
+## See also
+- [Wavelength](/wiki/Wavelength)
+- [Electromagnetic Wave](/wiki/Electromagnetic_Wave)
+- [Heinrich Hertz](/wiki/Heinrich_Hertz)
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