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Memorial of Heinrich Hertz on the campus of the Karlsruhe Institute of Technology, which translates as At this site, Heinrich Hertz discovered electromagnetic waves in the years 1885–1889 In 1881 and 1882, Hertz published two articles [ 32 ] [ 33 ] [ 34 ] on what was to become known as the field of contact mechanics , which proved to be an ...
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.
In Hertz's 1887 experiment he found that these waves would transmit through different types of materials and also would reflect off metal surfaces in his lab as well as conductors and dielectrics. The nature of these waves being similar to visible light in their ability to be reflected, refracted, and polarized would be shown by Hertz and ...
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).
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.
1944: The Avery–MacLeod–McCarty experiment isolates DNA as the genetic material (at that time called transforming principle). [24]1947: Salvador Luria discovers reactivation of irradiated phage, [25] stimulating numerous further studies of DNA repair processes in bacteriophage, [26] and other organisms, including humans.
Heinrich Rudolf Hertz's work in the domain of electromagnetic radiation was pivotal to the development of modern telecommunication. [9] Karl Ferdinand Braun invented the phased array antenna in 1905, [ 10 ] which led to the development of radar , smart antennas and MIMO , and shared the 1909 Nobel Prize in Physics with Guglielmo Marconi "for ...
Maxwell's theory predicted there ought to be other types, with different frequencies. After some ingenious experiments, Maxwell's prediction was confirmed by German physicist Heinrich Hertz. In the process, Hertz generated and detected what are now called radio waves and built crude radio antennas and the predecessors of satellite dishes. [27]