Q. When were electric waves discovered?

A. In the 19th century, a man named Maxell in the United Kingdom discovered the laws of an electric field (where the power of electricity acts) and magnetic field (where the power of magnetism acts). And a man named Hertz in Germany confirmed them by experiments and proved that electric waves are created from alternating current by using a Leiden bottle. The term Hertz (Hz) remains as the unit of measuring frequency.