Words starting with cathoder
Maybe these words will be useful:
- cathode ray oscilloscope — A cathode ray oscilloscope is an instrument based upon the cathode ray tube, that provides a visible image of one or more rapidly varying electrical quantities.
- cathodes — Plural form of cathode.
- cathode — A cathode is the negative electrode in a cell such as a battery. Compare anode.
- cathode dark space — Crookes dark space.
- cathode glow — a luminous region between the Aston dark space and the Crookes dark space in a vacuum tube, occurring when the pressure is low.
- cathode ray — a flow of electrons emanating from a cathode in a vacuum tube and focused into a narrow beam.
- cathode rays — a stream of electrons emitted from the surface of a cathode in a valve
- cathode-ray tube — A cathode-ray tube is a device in televisions and computer terminals which sends an image onto the screen.
- cathode ray tube — (hardware) (CRT) An electrical device for displaying images by exciting phosphor dots with a scanned electron beam. CRTs are found in computer VDUs and monitors, televisions and oscilloscopes. The first commercially practical CRT was perfected on 29 January 1901 by Allen B DuMont. A large glass envelope containing a negative electrode (the cathode) emits electrons (formerly called "cathode rays") when heated, as in a vacuum tube. The electrons are accelerated across a large voltage gradient toward the flat surface of the tube (the screen) which is covered with phosphor. When an electron strikes the phosphor, light is emitted. The electron beam is deflected by electromagnetic coils around the outside of the tube so that it scans across the screen, usually in horizontal stripes. This scan pattern is known as a raster. By controlling the current in the beam, the brightness at any particular point (roughly a "pixel") can be varied. Different phosphors have different "persistence" - the length of time for which they glow after being struck by electrons. If the scanning is done fast enough, the eye sees a steady image, due to both the persistence of the phospor and of the eye itself. CRTs also differ in their dot pitch, which determines their spatial resolution, and in whether they use interlace or not.