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Cathode ray: Quiz

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Question 1: The technology of manipulating electron beams pioneered in these early tubes was applied practically in the design of vacuum tubes, particularly in the invention of the ________ by Ferdinand Braun in 1897.
Plasma displayOrganic LEDLiquid crystal displayCathode ray tube

Question 2: This process is called ________ and can reduce the anode to cathode voltage needed to obtain effective currents.
ElectronThermionic emissionVacuum tubeDiode

Question 3: In early vacuum tubes (________) this was done solely by the high electrical potential between the anode and the cathode.
X-rayCathode rayElectronCrookes tube

Question 4: In 1897 British physicist ________ showed the rays were composed of a previously unknown negatively charged particle, which was later named the electron.
J. J. ThomsonJohn Strutt, 3rd Baron RayleighWilliam Henry BraggMarie Curie

Question 5: Cathode rays (also called an electron beam or e-beam) are streams of ________ observed in vacuum tubes, i.e.
AtomPositronElectronPhoton

Question 6: By the 1870s, British physicist ________ and others were able to evacuate tubes to a lower pressure, below 10−6 atm.
Cyril Norman HinshelwoodErnest RutherfordWilliam CrookesJ. J. Thomson

Question 7: When they struck atoms in the glass wall, they excited their orbital electrons to higher energy levels, causing them to ________.
Fluorescent lampFluorescenceLight-emitting diodeUltraviolet

Question 8: A more reliable and controllable method of producing cathode rays was investigated by Hittorf and Goldstein, and rediscovered by ________ in 1880.
Elihu ThomsonThomas EdisonEdwin J. HoustonAlexander Graham Bell

Question 9: To release electrons into the tube, they first must be detached from the ________ of the cathode.
NeutronPhotonAtomMatter

Question 10: and is today employed in sophisticated devices such as ________, electron beam lithography, and particle accelerators.
Transmission electron microscopyScanning electron microscopeElectron microscopeGold







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