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The experiment Cathode Ray Tube (CRT) conducted by J. J. Thomson, is one of the most well-known physical experiments that led to electron discovery. In addition, the experiment could describe characteristic properties, in essence, its affinity to positive charge, and its charge to mass ratio. This paper describes how J is simulated.
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Thomson also placed two magnets on either side of the tube, and observed that this magnetic field also deflected the cathode ray. The results of these experiments helped Thomson determine the mass-to-charge ratio of the cathode ray particles, which led to a fascinating discovery − the mass of each particle was much, much smaller than that of any known atom.
- How can we calculate e/m value of elactron?The angle of deflection in the thomson experiment depends on the e/m value. This is because F = ma So a = F/m F is proportional to e So a is propor...
- comparing thomsons exp. and rutherford's exp. why does the rays deflect in rutherford's model due to...@Afeefdk Because they very different experiments...Look at both the experiments. In the Thomson's experiment, J.J Thompson didn't strike the cathod...
- In th Rutherford experiment, why did he use alpha particles ( He2+) ? wouldn't it have been better i...Rutherford was interested in radio-chemistry (radioactivity) and what it might reveal about the atom. is focus was on alpha particles (from alpha r...
- How Rutherford told that atom is like a solar system?on which base ?Because he used classical physics (although he quantized the angular momentum) to conceive his model....and classical physics is based on intuitive...
- why did we have to name positive ions cations and not anions, since most of the naming in science se...The negatively charged electrode is the anode, this is where the electrons in a current originate. The positively charged electrode is the cathode...
- How did Rutherford make the alpha particles of helium and how did he concentrate those particles so ...He put the radium in a container with only one 'hole' for the alpha particles to get out. Any alpha particles going in other directions simply don'...
- is anode rays consist of proton ?You are right, both kinds of rays are emitted simultaneously. the cathode rays consist of electrons, while the anode/canal rays are the positively...
In response, J. J. Thomson constructed some elegant experiments to find a definitive and comprehensive answer about the nature of cathode rays. Thomson’s First Cathode Ray Experiment Thomson had an inkling that the ‘rays’ emitted from the electron gun were inseparable from the latent charge, and decided to try and prove this by using a ...
J.J. Thomson (1897) "Cathode Rays", The Electrician 39, 104, also published in Proceedings of the Royal Institution 30 April 1897, 1–14—first announcement of the "corpuscle" (before the classic mass and charge experiment) J.J. Thomson (1897), Cathode rays, Philosophical Magazine, 44, 293—The classic measurement of the electron mass and charge
- George Paget Thomson, Joan Paget Thomson
- Trinity College, Cambridge
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Apr 22, 2014 · The cathode ray tube experiment performed by J.J. Thomson demonstrated the existence of the electron. Scientist had believed in the existence of a negative particle for some time. So much so, that George Stoney (1891) proposed the name electron for the particle. However, it wasn't till about 1898 that the electron was shown to exist by J.J ...
In this section I will discuss the grounds for belief in the existence of the electron by examining J.J. Thomson’s experiments on cathode rays. His 1897 experiment on cathode rays is generally regarded as the “discovery” of the electron. The purpose of J.J. Thomson’s experiments was clearly stated in the introduction to his 1897 paper.
