The Collaborative International Dictionary of English. 2000.
Tube de Crookes — Photo d un tube de Crookes. Les électrons circulent en ligne droite de la cathode, sur la gauche, mise en évidence par l ombre portée de la croix sur la paroi fluorescente, à droite. L anode est en bas. Un tube de Crookes est un des premiers… … Wikipédia en Français
Tube — A long hollow cylinder. There are many tube like structures in the human body, such as the auditory tube (Eustachian tube) in the ear. * * * 1. A hollow cylindrical structure or canal. 2. A hollow cylinder or pipe. SYN: tuba [TA]. [L. tubus]… … Medical dictionary
Johann Wilhelm Hittorf — Infobox Scientist name = Johann Wilhelm Hittorf box width = image width =150px caption = Johann Wilhelm Hittorf birth date = March 27, 1824 birth place = Bonn death date = November 28, 1914 death place = Münster residence = citizenship =… … Wikipedia
Crookes tube — A Crookes tube. The electrons travel in straight lines from the cathode on the left, shown by the shadow cast by the cross on the fluorescence on the righthand wall. The anode is at the bottom. A Crookes tube is an early experimental electrical… … 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
Crookes — Sir William, British physicist and chemist, 1832–1919; winner of the Nobel Prize in chemistry in 1907. See C. glass, C. Hittorf tube … Medical dictionary
Variétés allotropiques du phosphore — Le phosphore blanc et les variétés allotropiques qui en découlent. Le phosphore élémental peut exister sous formes amorphes ou cristallines : il s agit de variétés allotropiques du phosphore. Les plus communes sont le phosphore blanc et le… … Wikipédia en Français
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
Wilhelm Röntgen — Wilhelm Conrad Röntgen Born Wilhelm Conrad Röntgen 27 March 1845(1845 03 27) Lennep, Germany … Wikipedia
atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… … Universalium
