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en.wikipedia.org/wiki/Heinrich_Hertz

Heinrich Rudolf Hertz (/ h ɜːr t s /; German: [ˈhaɪ̯nʁɪç ˈhɛɐ̯ts]; 22 February 1857 – 1 January 1894) was a German physicist who first conclusively proved the existence of the electromagnetic waves theorized by James Clerk Maxwell's electromagnetic theory of light.The unit of frequency, cycle per second, was named the "Hertz" in his honor.

www.youtube.com/watch?v=9gDFll6Ge7g

Heinrich Hertz proved experimentally the existence of EM waves. We show a simplified version of his famous experiment.

www.famousscientists.org/how-hertz-discovered-radio-waves

As Maxwell had predicted, the oscillating electric charges produced electromagnetic waves – radio waves – which spread out at the speed of light through the air around the wire. Hertz detected the waves with his copper wire receiver – sparks jumped across its spark gap, even though it was as far as 1.5 meters away from the transmitter.

scihi.org/heinrich-hertz-electromagnetic-waves

On November 13, 1886, German physicist Heinrich Hertz succeeded to transmit electromagnetic waves from a sender to a receiver in Karlsruhe. Hertz conclusively proved the existence of the electromagnetic waves theorized by James Clerk Maxwell’s electromagnetic theory of light.[4] The unit of frequency – cycle per second – was named the “ hertz ” in his honor.

www.juliantrubin.com/bigten/hertzexperiment.html

In this experiment Hertz confirmed Maxwell’s theories about the existence of electromagnetic radiation. In more advanced experiments, Hertz measured the velocity of electromagnetic radiation and found it to be the same as the light’s velocity.

en.wikipedia.org/wiki/Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second. It is named for Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (10 3 Hz, kHz), ...

people.seas.harvard.edu/~jones/cscie129/nu_lectures/lecture6/hertz/...

This occurred when Hertz turned on the oscillator, producing the first transmission and reception of electromagnetic waves. Hertz also noted that electrical conductors reflect the waves and that they can be focused by concave reflectors. He found that nonconductors allow most of the waves to pass through.

www.aaas.org/heinrich-hertz-and-electromagnetic-radiation

Heinrich Hertz was a brilliant German physicist and experimentalist who demonstrated that the electromagnetic waves predicted by James Clerk Maxwell actually exist. Hertz is also the man whose peers honored by attaching his name to the unit of frequency; a cycle per second is one hertz. The usual path of science is to go from phenomenon to theory.

www.tutorialspoint.com/electromagnetic_waves/hertz...

Hertz experiment was the first to prove the existence of electromagnetic waves. He also concluded that electromagnetic waves do not require a medium to travel. Hertz used the high tension coil to generate large amount of potential difference across the circuit. When the high potential difference was ...