How did Thomson know that cathode rays had a negative electrical charge
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How did Thomson know that cathode rays had a negative electrical charge

[From: ] [author: ] [Date: 11-09-08] [Hit: ]
the negative charge repelled and the positive charge attracted. he also used magnetically charged plated.......
I do listen in class, but the teacher said to look into the textbook for answers, which he...not very smartly forgot, that we cannot bring the textbooks home and we cannot get the textbook online.. soooo any sort of information surrounding this question would be great! Thanks!!

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Try this description: http://www.aip.org/history/electron/jj18…

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He used magnets. the negative charge repelled and the positive charge attracted. he also used magnetically charged plated.
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