Unformatted text preview: ets. The first cathode-ray tube was made by
Michael Faraday (1791–1867) about 150 years ago. When he passed electricity through glass tubes from which most of the air had been evacuated,
Faraday discovered cathode rays, a type of radiation emitted by the negative
terminal, or cathode. The radiation crossed the evacuated tube to the positive
terminal, or anode. Later scientists found that cathode rays travel in straight
lines and have properties that are independent of the cathode material (that
is, whether it is iron, platinum, and...
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