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An oscillator that was among the exhibits Tesla demonstrated at the World's Columbian Exposition in 1893. Tesla's electro-mechanical oscillator is a steam-powered electric generator patented by Nikola Tesla in 1893. [1][2] Later in life Tesla claimed one version of the oscillator caused an earthquake in New York City in 1898, gaining it the ...
Another electrode used with the same set. A violet ray is an antique medical appliance used during the early 20th century to discharge in electrotherapy. Their construction usually featured a disruptive discharge coil with an interrupter to apply a high voltage, high frequency, low current to the human body for therapeutic purposes.
Nikola Tesla first noted around 1891 the ability of high-frequency currents to produce heat in the body and suggested its use in medicine. [1] By 1900 application of high-frequency current to the body was used experimentally to treat a wide variety of medical conditions in the new medical field of electrotherapy.
The global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances are the principal background in the part of the electromagnetic spectrum [2] from 3 Hz through 60 Hz [3] and appear as distinct peaks at extremely low frequencies around 7.83 Hz (fundamental), 14.3, 20.8, 27.3, and 33.8 Hz.
A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. [1] It is used to produce high-voltage, low-current, high-frequency alternating-current electricity. [2] [3] Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits.
List of Nikola Tesla writings. Tesla, aged 37, 1893, photo by Napoleon Sarony. Tesla wrote a number of books and articles for magazines and journals. [1] Among his books are My Inventions: The Autobiography of Nikola Tesla; The Fantastic Inventions of Nikola Tesla, compiled and edited by David Hatcher Childress; and The Tesla Papers.
History of the Tesla coil. Henry Rowland's 1889 spark-excited resonant transformer, [1] a predecessor to the Tesla coil. [2] Steps in Tesla's development of the Tesla transformer around 1892. [3] (1) Closed-core transformers used at low frequencies, (2-7) rearranging windings for lower losses, (8) removed iron core, (9) partial core, (10-11 ...
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...