File:J J Thomsons cathode ray tube with magnet coils, 1897. (9663807404).jpg
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Summary
| Description | This apparatus was used to discover the electron. In 1896, in Cambridge, Joseph John Thomson (1856-1940) began experiments on cathode rays. In Britain, physicists argued these rays were particles, but German physicists disagreed, thinking they were a type of electromagnetic radiation. Thomson showed that the cathode rays were particles with a negative charge and much smaller than an atom. He published this information in April 1897; the particles were later named electrons. Apparatus shown without its stand. |
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J J Thomson's cathode ray tube with magnet coils, 1897.
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| Author | Science Museum London / Science and Society Picture Library |
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This image, originally posted to Flickr, was reviewed on 3 September 2013 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:25, 3 September 2013 | | 1,250 × 832 (110 KB) | File Upload Bot (Magnus Manske) | Transferred from Flickr by User:Mrjohncummings |
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