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Heinrich Rudolf Hertz (/ h ɜːr t s / HURTS; German: [ˈhaɪnʁɪç hɛʁts]; [1] [2] 22 February 1857 – 1 January 1894) was a German physicist who first conclusively proved the existence of the electromagnetic waves predicted by James Clerk Maxwell's equations of electromagnetism.
Hertz wireless experiments (1887): Heinrich Hertz demonstrates free space electromagnetic waves, predicted by Maxwell's equations, with a simple dipole antenna and spark gap oscillator. Thomson's experiments with cathode rays (1897): J. J. Thomson's cathode ray tube experiments (discovers the electron and its negative charge).
The Franck–Hertz experiment was the first electrical measurement to clearly show the quantum nature of atoms. It was presented on April 24, 1914, to the German Physical Society in a paper by James Franck and Gustav Hertz. [1] [2] Franck and Hertz had designed a vacuum tube for studying energetic electrons that flew through a thin vapor of ...
1863 – Gregor Mendel's pea plant experiments (Mendel's laws of inheritance). 1887 – Heinrich Hertz discovers the photoelectric effect. 1887 – Michelson and Morley: Michelson–Morley experiment, showing that the speed of light is invariant. 1896 – Henri Becquerel discovers radioactivity. 1897 – J. J. Thomson discovers the electron.
German physicist Heinrich Hertz in 1887 built the first experimental spark gap transmitters during his historic experiments to demonstrate the existence of electromagnetic waves predicted by James Clerk Maxwell in 1864, in which he discovered radio waves, [23] [24]: p.3-4 [25] [17]: p.19, 260, 331–332 which were called "Hertzian waves" until ...
The experimental proof of Maxwell's equations was demonstrated by Heinrich Hertz in a series of experiments in the 1890s. [14] After that, Maxwell's equations were fully accepted by scientists. Relationships among electricity, magnetism, and the speed of light
Heinrich Hertz. November – The Michelson–Morley experiment is performed, indicating that the speed of light is independent of motion. Heinrich Hertz discovers the photoelectric effect on the production and reception of electromagnetic waves in radio, an important step towards the understanding of the quantum nature of light.
1914 – James Franck and Gustav Hertz report their experiment on electron collisions with mercury atoms, which provides a new test of Bohr's quantized model of atomic energy levels. [ 18 ] 1915 – Einstein first presents to the Prussian Academy of Science what are now known as the Einstein field equations .