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| • | Find rays have
same properties regardless of metal |
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| used in
constructing the cathode. |
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| • | Experiments show that cathode rays are
made of |
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| charged particles
that interact with electric and |
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| magnetic field
when moving. |
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| • | Particles are negatively charged
(repelled by the |
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| negative plate,
attracted toward the positive plate). |
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| • | These negative
particles are fundamental particles |
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| of matter.
Called electrons. (1897 Thomson) |
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