[DOC] [TLE] Discovery of the Electron: J. J. Thomson - Le Moyne [PAR] After all, he did not invent the vacuum tube or discover cathode rays. ... Thomson 
was not the only physicist to measure the charge-to-mass ratio of cathode ... 
electricity and the rays will be surrounded by a conductor which will screen them 
.... If these plates are charged, they will drag the electrified particles out of the gas 
as... [DOC] [TLE] J. J. Thomson - Wikipedia [PAR] Sir Joseph John Thomson OM PRS was an English physicist. He was elected as 
a fellow of the ... In 1897, Thomson showed that cathode rays were composed of 
previously unknown negatively charged ... His experiments to determine the 
nature of positively charged particles, with Francis William Aston, were the first 
use of... [DOC] [TLE] Cathode ray - Wikipedia [PAR] Cathode rays are streams of electrons observed in vacuum tubes. If an 
evacuated glass tube is ... In 1897 British physicist J. J. Thomson showed the 
rays were composed of a ... These are used in cathode ray tubes, found in 
televisions and computer .... (microbiology)  Electron beam technology  
phosphorescent screen... [DOC] [TLE] Cathode ray tube - Wikipedia [PAR] The cathode ray tube (CRT) is a vacuum tube that contains one or more electron 
guns and a phosphorescent screen, and is used to display images. It modulates, 
accelerates, and deflects electron beam(s) onto the screen to ... In 1897, J. J. 
Thomson succeeded in measuring the mass of cathode rays, showing that they... [DOC] [TLE] Cathode Ray Experiment by J. J. Thomson - Explorable.com [PAR] J. J. Thomson's Cathode Ray Experiment helped find particles which was not 
known ... William Crookes discovered that a tube coated in a fluorescing material 
at the ... slits in it, leading to electrometers, which could measure small electric 
charges. ... and developed the second stage of the experiment, to prove that the 
rays... [DOC] [TLE] J.J. Thomson's experiment and the charge-to-mass ratio of the electron [PAR] J.J. Thomson's experiment and the charge-to-mass ratio of the electron. ... The 
source of these charged particles is a heated cathode that, in fact, causes the ... 
In 1897, Thomson set out to prove that the cathode rays produced from the 
cathode ... In order to determine this velocity, electric and magnetic fields are both 
applied,... [DOC] [TLE] J.J. Thomson, Cathode Rays and the Electron Introduction ... [PAR] Apr 26, 2006 ... Thomson's tube design allowed him to determine the ratio of the cathode ray 
particle's charge to its mass. The clever ... between the cathode and anode 
accelerates these negatively charged particles away from the cathode and ... 
Volts/meter and B is measured in Tesla, the velocity comes out in meters/sec. [DOC] [TLE] Charge to Mass of Electron [PAR] THE J. J. THOMSON EXPERIMENT .... What was the velocity v of the electrons in 
the tube? ... Thomson subjected the cathode rays in his tube to electric and 
magnetic fields ... In another experiment, Thomson measured the charge-to-mass 
ratio of ... That these particles are all of the same mass, and carry the same 
charge of... [DOC] [TLE] Cathode ray tube - New World Encyclopedia [PAR] Apr 25, 2013 ... Cathode ray tube employing electromagnetic focus and deflection ... The 
development of imaging technologies without these disadvantages has caused 
.... The phosphor screen of most oscilloscope tubes contains a permanently-
marked ..... Flash of the Cathode Rays: A History of J J Thomson's Electron. [DOC] [TLE] Electron - Cronodon [PAR] This is the nature of quantum physics, however, as these pages develop we shall 
... Some sort of particle is carrying electric charge across the space inside the ... 
introduced a metal cylinder between the filament and the screen, this is now ... 
Experiment 3: The Thomson cathode ray tube as used to measure electron 
velocity [DOC] [TLE] Rays and Particles - Galileo - University of Virginia [PAR] In 1897, J. J. Thomson announced at the Royal Institution that they were ... He 
achieved this with a specially designed cathode ray tube, the precursor of the

Question: J.J. Thompson developed a cathode-ray tube with a screen to measure velocity of these particles
Answer: electrons