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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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1 Jun 1879 Jahr - Sir William Crookes’ experiments with cathode-ray tubes led him to confirm the work of earlier scientists by definitively demonstrating that cathode-rays have a negative charge.

Zugefügt zum Band der Zeit:

26 Sep 2017
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Datum:

1 Jun 1879 Jahr
Jetzt
~ 145 years ago