Licht, Waerme, Strahlen / Magnetismus, Elektrizitaet, Induktion / Daemonen und Geister

Licht, Waerme, Strahlen / Magnetismus, Elektrizitaet, Induktion / Daemonen und Geister

Electroscope
Device for detecting static electric charges, Alessandro Volta, late eighteenth century
Contact with an electric charge forces the threads with the pith balls apart, because identical charges repel each other. Volta combines the electroscope with a plate capacitor to amplify the effect.
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