This effect, the emission of electrons from a heated metal in a vacuum, is named for an American inventor
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Vacuum tube - Wikipedia  In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve is a device that controls electric current between electrodes in an evacuated container. Vacuum tubes mostly rely on thermionic emission of electrons from a hot filament or a cathode heated by the filament. ... In the 1940s the invention of semiconductor devices made it possible to...
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Hot cathode - Wikipedia  In vacuum tubes, a hot cathode or thermionic cathode is a cathode electrode which is heated to make it emit electrons due to thermionic emission. ... In an indirectly-heated cathode, the filament or heater heats a separate metal cathode ... would affect the movement of the electrons and introduce hum into the tube output.
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Thermionic emission - Wikipedia  Thermionic emission is the thermally induced flow of charge carriers from a surface or over a potential-energy barrier. This occurs because the thermal energy...
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Vacuum tube (Inventions) - In Depth Tutorials and Information  The invention: A sealed glass tube from which air and gas have been removed ... an American inventor Lee de Forest (1873-1961), an American scientist and ... leading to the invention of the vacuum tube was the Edison effect by Thomas Alva .... such as metal oxides, they emitted far more electrons at a given temperature.
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Transmission electron microscopy - Wikipedia  Transmission electron microscopy (TEM) is a microscopy technique in which a beam of ... This effect had been utilized to build primitive cathode ray oscilloscopes ... electron microscopes being manufactured in Manchester UK, the USA (RCA), ... emit electrons either by thermionic or field electron emission into the vacuum.
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This material is based upon work supported by the National Science ...  Amplifier An electronic circuit that boost the voltage and/or the current level ... Named for Charles Coulomb, the French physicist who pioneered research into magnetism and electricity. ... Farad (F) The basic unit of measurement for capacitance. ... Named for Michael Farady, the British physicist and chemist who discovered...
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What is the Photoelectric Effect? - PhysLink.com  The photoelectric effect refers to the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light. ... Albert Einstein received the Nobel prize in physics in 1921 for explaining the photoelectric effect and...
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Jeopary Questions page 1951 - "CHA" CHA CHA - TriviaBistro.com  EFFECTS: This 19th century Frenchman gave his name to an effect by which oxygen inhibits fermentation  PIERCED ... EFFECTS: In the Barkhausen effect, a metal gains this property in minute steps rather than continuously  ATHLETES: This...
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Arthur Compton - Wikipedia  Arthur Holly Compton (September 10, 1892  March 15, 1962) was an American physicist who won the Nobel Prize in Physics in 1927 for his discovery of the Compton effect, which demonstrated the particle nature of electromagnetic radiation. It was a sensational discovery at the time: the wave nature of light had been ..... Compton invented a more gentle, elongated, and ramped version of the...
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Geissler tube - Wikipedia  A Geissler tube is an early gas discharge tube used to demonstrate the principles of electrical glow discharge, similar to modern neon lighting. The tube was invented by the German physicist and glassblower Heinrich ... The current dissociates electrons from the gas molecules, creating ions, and when the electrons...
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Jeopary Questions page 765 - WORKPLACES - TriviaBistro.com  CHEMISTRY CLASS: This man whose name is on a laboratory burner invented a carbon-zinc electric cell  FOOD BRANDS: In 1954 Swift chose this word that...
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heinrich geissler: pioneer of electrical science and vacuum technology  had elements in common. Three ... 1923) discovered a new and different ... electron vacuum tube in 1909, has ... This article provides an account of Heinrich Geissler's ... would be to become acquainted with ... he was able to build up during ... exerted upon a column of mercury .... vacuum pump based on moving a col-.
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What is the Photoelectric Effect? - PhysLink.com  The photoelectric effect refers to the emission, or ejection, of electrons from the ... Energy contained within the incident light is absorbed by electrons within the ... Albert Einstein received the Nobel prize in physics in 1921 for explaining the...
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List of Christians in science and technology - Wikipedia  He wrote Observations on the Theory of the Motion and ... The unit for electric current, Ampere, is named after him. ... who created the a textbook about neuropathology. ... and was a founding figure in British entomology. ... and work on the chemical kinetic theory of gases.
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How'd that tool get named? On shocked frogs & more - Wholesale ...  Mar 17, 2016 ... The origin of a tool name or industry term can be really interesting. ... anatomist from Italy who experimented in electrocuting dead frogs. ... The grease zerk was invented by Oscar Ulysses Zerk (born Oscar Zerkowitz). ... This unit of electric current is named after French physicist Andre-Marie Ampere, whose...
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Quantized Energy (Planck) - KentChemistry HOME  In 1900, a German scientist named Max Planck wrote an equation to show this ... A quantum is the smallest bit of electromagnetic radiation that can be emitted.
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History of electromagnetic theory - Wikipedia  The history of electromagnetic theory begins with ancient measures to understand atmospheric ... Amber, when rubbed, attracts light bodies; magnetic iron ore has the power of ... Thales wrote on the effect now known as static electricity. .... in a vacuum would attract light substances, thus indicating that the electrical effect did...
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Discovery of the Electron: J. J. Thomson - Le Moyne  In 1897 he reported that "cathode rays" were actually negatively charged particles ... from the cathode--the electrode where the negative electricity enters the tube--can be ..... That is, the English physicists thought cathode rays were a stream of...
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Free Flashcards about PHYSICS - StudyStack  EINSTEIN WON THE NOBEL PRIZE FOR EXPLAINING THIS EFFECT SEEN WHEN LIGHT HITS METAL, PHOTOELECTRIC EFFECT. THIS BRANCH OF...
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jeopardy/1405_Qs.txt at master  jedoublen/jeopardy  GitHub  Number: 13. BEN FRANKLIN | 1751's "Experiments and Observations on" this helped make Ben's name; the book was translated into French in 1752 | electricity.
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Geissler tube - Wikipedia  A Geissler tube is an early gas discharge tube used to demonstrate the principles of electrical ... By the 1870s better vacuum pumps enabled scientists to evacuate Geissler tubes to a higher vacuum; these were called Crookes tubes after William ... signs, which use both visible light discharge from neon and other gases and...