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Topic: Cathode ray

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	Cathode - Wikipedia, the free encyclopedia
		Diagram of a copper cathode in a Daniell's cell.
		In a galvanic cell, the cathode is where the positive pole is connected to allow the circuit to be completed: as the anode of the galvanic cell gives off electrons, they return from the circuit into the cell through the cathode.
		In a semiconductor diode, the cathode is the N–doped layer of the PN junction.
	en.wikipedia.org /wiki/Cathode (559 words)

	Cathode ray tube - Wikipedia, the free encyclopedia
		The cathode ray tube or CRT, invented by Karl Ferdinand Braun, is the display device that was traditionally used in most computer displays, video monitors, televisions, radar displays and oscilloscopes.
		The first version to use a hot cathode was developed by J. Johnson (who gave his name to the term Johnson noise) and H. Weinhart of Western Electric and became a commercial product in 1922.
		Cathode rays exist in the form of streams of high speed electrons emitted from the heating of cathode inside a vacuum tube at its rear end.
	en.wikipedia.org /wiki/Cathode_ray_tube (3810 words)

	X Ray - MSN Encarta
		X rays were discovered accidentally in 1895 by the German physicist Wilhelm Conrad Roentgen while he was studying cathode rays in a high-voltage, gaseous-discharge tube.
		Both light and X rays are produced by transitions of electrons that orbit atoms, light by the transitions of outer electrons and X rays by the transitions of inner electrons.
		If the emitted X rays are passed through an X-ray spectrometer, certain distinct lines are found superimposed on the continuous spectrum; these lines, known as the characteristic X rays, represent wavelengths that depend only on the structure of the target atoms.
	encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761579196 (1024 words)

	Introduction to Gas Discharge Tubes and Cold Cathode X-ray Tubes
		Many of the electrons (originally referred to as cathode rays) accelerating towards the end of the tube where the anode was located picked up sufficient kinetic energy to cause further ionization of the residual gas.
		The cathode rays streamed past the anode and struck the glass end of the tube which served as the source of the x-rays.
		In this configuration, the anode served as the target of the cathode rays and the source of the x-rays.
	www.orau.org /ptp/collection/xraytubes/introduction.htm (1195 words)

	Mysterious Rays (Site not responding. Last check: 2007-10-08)
		But when the German physicist Heinrich Hertz passed the rays through an electric field created by metal plates inside a cathode ray tube, the rays were not deflected in the way that would be expected of electrically charged particles.
		When Lenard passed cathode rays through a metal foil and measured how far they traveled through various gases, he concluded that if these were particles, they had to be very small.
		Cathode rays are not only material particles, he suggested, but in fact the building blocks of the atom: they are the long-sought basic unit of all matter in the universe.
	www.aip.org /history/electron/jjrays.htm (451 words)

	History of the CRT and beginning of computer monitors using cathode ray tubes
		The Cathode Ray Tube and Electronic television is the picture tube found in modern monitors.
		A cathode ray tube or CRT is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface.
		Cathode Rays improved monumentally with the Discovery of the Electron.
	www.tccmonitor.com /crt-history.php (225 words)

	cathode ray - Hutchinson encyclopedia article about cathode ray
		Stream of fast-moving electrons that travel from a cathode (negative electrode) towards an anode (positive electrode) in a vacuum tube.
		Cathode rays focused into fine beams of fast electrons are used in cathode-ray tubes, the electrons' kinetic energy being converted into light energy as they collide with the tube's fluorescent screen.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /cathode+ray (134 words)

	MONTEST-LCD monitor tester, Video Primer, Cathode Ray Tube CRT
		The CRT was designed in the 1920's and although several changes have been made to the original design, the changes to the basic structure have been relatively minor.
		Located closest to the heated cathode is a round disc, approximately the size and the shape of a dime with a small hole in the center.
		Because of its closeness to the cathode, this control grid, when charged to a small (3-5 volt) negative potential, will deflect electrons back toward the cathode and prevent the beam from entering the focus and accelerating subsystem.
	www.montest.com /mon-apps.html (1626 words)

	Cathode-ray tube (Site not responding. Last check: 2007-10-08)
		CRT consists of the glass bulb evacuated to a high vacuum, the cathode (a source of electrons), cathode heater, electrodes for brightness and focus control, several accelerating anodes, the pairs of horizontal and vertical capacitor plates deviating the electron beam, and fluorescing screen.
		Under the action of the applied voltage the electrons are moved with acceleration from cathode to anode.
		For this reason, during retrace a negative voltage is applied to control electrode situated near to cathode and electrons are locked by such a way at the electron gun.
	physics.nad.ru /Physics/English/osc_txt.htm (304 words)

	ChemTeam: Cathode Ray Tube History
		1858 Julius Plücker shows that cathode rays bend under the influence of a magnet suggesting that they are connected in some way; this leads in 1897 to discovery that cathode rays are composed of electrons.
		This was in response to the prediction by Lenard that cathode rays would move with the velocity of light.
		As concerning the nature of the cathode ray, the Germans tended to the explanation that cathode rays were a wave (like light), whereas the British tended to believe that the cathode ray was a particle.
	dbhs.wvusd.k12.ca.us /webdocs/AtomicStructure/Disc-of-Electron-History.html (799 words)

	Demonstration Cathode Ray Oscilloscope
		Standard cathode ray tubes for oscilloscopes are poorly suited for demonstrations because important sections of the tubes are electrostatically and magnetically shielded, thus concealed from the view of the observer.
		Furthermore, these conventional cathode ray tubes require high accelerating voltages making them dangerous for an exposed setup.
		KE5521 Cathode Ray Oscilloscope consists of a modified Braun tube, screen diameter 10 cm, an indirectly heated cathode with a near point source emissive oxide spot, and a disc anode with axial hole.
	www.klingereducational.com /products/modern_physics_experiments/demonstration_cathode_ray_osci/demonstration_cathode_ray_osci.html (224 words)

	The cathode-ray tube (CRT)
		The cathode of the electron gun in the CRT is required not only to emit electrons, but also to concentrate emitted electrons into a tight beam.
		In the electron tubes that you have studied, the cathode was cylindrical and emitted electrons in all directions along its entire length.
		The number of electrons that leave the area of the cathode is determined by the cap-shaped grid.
	www.tpub.com /neets/book6/21e.htm (1569 words)

	Cathode Ray Tube Encyclopedia @ LaunchBase.com (Launch Base) (Site not responding. Last check: 2007-10-08)
		As a result of CRT technology, television continues to be referred to as "The Tube" well into the 21st century, even when referring to non-CRT sets.
		Because of the X-ray hazard, the glass envelopes of most modern CRTs are made from heavily leaded glass.
		Screen filters are available to reduce these effects.
	www.launchbase.com /encyclopedia/Cathode_ray_tube (2933 words)

	ChemTeam: Cathode Ray Tube Results (Site not responding. Last check: 2007-10-08)
		There were a number of results gathered over the years by cathode ray tube researchers.
		The cathode rays bend toward the positive pole, confirming that cathode rays is negatively charged.
		Thomson had developed formulas based on the deflection of the cathode ray by the electric field and by the magnetic field.
	dbhs.wvusd.k12.ca.us /webdocs/AtomicStructure/Disc-of-Electron-Results.html (589 words)

	Cathode Ray Tubes (CRTs) (Site not responding. Last check: 2007-10-08)
		Cathode Ray Tubes (CRTs) are found in most conventional TV and computer monitors.
		The California Department of Toxics and Substance Control (DTSC) has stated that the material in Cathode Ray Tubes is hazardous and that CRTs are banned from California municipal landfills.
		Because each cathode ray tube contains approximately five to seven pounds of lead as well as other hazardous constituents, discarded monitors and televisions are subject to California hazardous waste regulations administered by the Department of Toxic Substances Control (DTSC).
	r4.ucdavis.edu /services/crt/crt.htm (552 words)

	Tesla coil science fair project plan & plans for building a cathode ray & laser. (Site not responding. Last check: 2007-10-08)
		Tesla coil science fair project plan and instructions for building a cathode ray tube, a helium-neon laser and a plasma globe powered by the Tesla coil.
		As if the Tesla Coil wasn't enough, coupled with the cathode ray tube it was a sure winner.
		The cathode ray tube is a vacuum tube, produced without a vacuum pump, and it's made from only a 1/2" dia.
	www.primeline-america.com /science (1129 words)

	Cathode ray tube repair and rebuild - Hawk-eye Picture Tube
		Each cathode ray tube is individually handled to ensure 100% satisfaction.
		The broadcast industry has relied on rebuilt cathode ray tubes from Hawk-Eye for over 20 years.
		As technology advances, count on Hawk-Eye to continue to serve your cathode ray tube needs, save $$$$, and benefit from 100% satisfaction.
	www.hawkeyepicturetube.com /broadcasttubes.html (114 words)

	Cathode-Ray Oscilloscope
		The heart of the CRO is a cathode-ray tube shown schematically in Fig.
		The cathode ray is a beam of electrons which are emitted by the heated cathode (negative electrode) and accelerated toward the fluorescent screen.
		The assembly of the cathode, intensity grid, focus grid, and accelerating anode (positive electrode) is called an electron gun.
	boson.physics.sc.edu /~hoskins/Demos/CathodeRay.html (1876 words)

	The Cathode Ray Oscilloscope
		This interactive tutorial is like an "indestructible oscilloscope" that lets students try their hand at this essential tool and learn the basic operations on-screen before they enter the lab.
		The topics covered are applicable to most types of oscilloscopes, and users can change settings and observe the results on screen, as they would occur on an actual oscilloscope.
		The Cathode Ray Oscilloscope is menu-driven and easy to use.
	webassign.net /pas/cathode_ray_oscilloscope/cro.html (322 words)

	Recycling Cathode Ray Tubes (CRTs)
		A Cathode Ray Tube, abbreviated “CRT”, is the main component in a television and computer monitors display unit.
		The CRT is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface.
		Effective April 1, 2000 Massachusetts imposed a ban on the disposal, incineration, or transfer for disposal, of Cathode Ray Tubes at a solid waste disposal facility.
	www.wastecap.org /wastecap/commodities/crt/crt.htm (992 words)

	General Chemistry Online: Glossary: (Site not responding. Last check: 2007-10-08)
		A substance which is not normally found in a living thing.
		Element 54, a colorless, inert gas used to fill cathode ray tubes.
		A cathode ray tube that focuses energetic streams of electrons on a metal target, causing the metal to emit x-rays
	antoine.frostburg.edu /chem/senese/101/glossary/x.shtml (166 words)

	Projector Pros - CRT Cathode Ray Tube Televisions Technology Information
		The CRT, or cathode ray tube, is the oldest technology currently available.
		The cathode ray tube is an evacuated glass bottle, with a heating element on one end and a phosphor-coated screen on the other.
		The electrons are sent speeding out of the yolk of the tube toward the phosphor-coated screen on the opposite end, which in turn causes the phosphor to glow.
	www.theprojectorpros.com /learn.php?s=learn&p=technologies_crt (386 words)

	Howstuffworks "How does the electron gun inside a TV work, and why is it called an "electron gun"?"
		In a cathode ray tube (CRT) -- the big glass tube used in most televisions and computer monitors -- the electrons get aimed at the screen, where they light up the phosphor on the screen to create the image.
		It contains the heater, cathode, focusing anode and accelerating anode for three electron beams.
		It heats a cathode, which emits a cloud of electrons.
	electronics.howstuffworks.com /question694.htm (387 words)

	DTSC Response to Questions Regarding Management of Cathode Ray Tubes (CRT) (Site not responding. Last check: 2007-10-08)
		On March 20, 2001, the California Department of Toxic Substances Control (DTSC) responded to an inquiry from the Materials for the Future Foundation (MFF) regarding the regulations pertaining to the management of cathode ray tubes (CRT).
		Picture tubes are also referred to as cathode ray tubes (CRT).
		DTSC will continue focusing its enforcement resources on complaint response and on violations of the hazardous waste regulations that present immediate and significant risks to public health or the environment (e.g., the improper disposal of cathode ray tubes to municipal solid waste landfills or other unauthorized locations).
	www.ciwmb.ca.gov /Electronics/RegIssues/DTSCMFF/032001Summ.htm (392 words)

	Blogcritics.org: The Real World Beckons the Cathode Ray Fray, but Rescue Me Triumphs Over All
		Luckily, the Ray, the sweet soothing soft seduction song of my Cathode Ray Fray came a-calling, and I was able to shut away from fresh air and summer climes to report that which it has become fundamentally vital and absolutely imperative to do so.
		Pulse the blinding Ray of the Ray's pulse against the sky like an emblem for our times and all the people look up flabbergasted and aghast and awed and joyed and rebirthed and exhumed from blind apoplexy and say together in Kerouac-ian ecstacy, "Awwwwwwwwwwww...."
		Because of that other level, friends of the Ray, the level that soothes and taunts and teases.
	blogcritics.org /archives/2005/08/26/160150.php (1606 words)

	Blogcritics.org: Cathode Ray Fray: Pay Cable TV Lock Down (Locking In), My Pretties
		Freed of the shackles of censorship and objective restraint (this show be for the liberal-minded folk, children of the Ray) Maher is sharp as a tack, brutally effective, and funny, funny, funny while easing off his normally smarmy tendencies.
		This show has a magical touch, not unlike both Buffy the Vampire Slayer and the Harry Potter series (all the books, and tack on the third film for kicks), an ability to mix crafty dialogue, innocent and youthful lead characters, and antics on the surface that give way to truly creepy yet intriguing depth.
		Sir Berlin, the Ray is headin in glorious directions this past while, the rebirth WILL prove to be one of the definin moments of your writin shenanigans from now till doomsday.
	blogcritics.org /archives/2005/09/15/170946.php (1610 words)

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