Crookes layer
Crookes space Crookes space (kr[oo^]ks). [After Sir William Crookes, English chemist, who first described it.] (Physics) The dark space within the negative-pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge; -- called also {Crookes layer}. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Crookes space — (kr[oo^]ks). [After Sir William Crookes, English chemist, who first described it.] (Physics) The dark space within the negative pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge; …   The Collaborative International Dictionary of English

  • Plasma (physics) — For other uses, see Plasma. Plasma lamp, illustrating some of the more complex phenomena of a plasma, including filamentation. The colors are a result of relaxation of electrons in excited states to lower energy states after they have recombined… …   Wikipedia

  • X-ray tube — An X ray tube is a vacuum tube that produces X rays. They are used in X ray machines. X rays are part of the electromagnetic spectrum, an ionizing radiation with wavelengths shorter than ultraviolet light. X ray tubes evolved from experimental… …   Wikipedia

  • X-ray — [ 22 December 1895 and presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896. The dark oval on the third finger is a shadow produced by her ring. [cite book last = Kevles first =Bettyann Holtzmann …   Wikipedia

  • Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… …   Wikipedia

  • Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

  • Histoire du procédé Haber-Bosch — L un des appareils de laboratoire qu utilisa Fritz Haber pour synthétiser de l ammoniac sous haute pression. L histoire du procédé Haber Bosch débute avec l invention du procédé de chimie homonyme à l aube du XXe siècle. Le procédé Haber… …   Wikipédia en Français

  • Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …   Wikipedia

  • Protactinium — thorium ← protactinium → uranium Pr ↑ Pa ↓ …   Wikipedia

  • Diamond enhancement — Diamond enhancements are specific treatments, performed on natural diamonds (usually those already cut and polished into gems), which are designed to improve the gemological characteristics and therefore the value of the stone in one or more ways …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”