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

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

Light Moves a Mill
Experimental demonstration, Phywe company, Göttingen

In 1875, William Crookes constructs a rotor whose vanes are set in motion by light. He calls his light mill a radiometer and initially explains the effect as a consequence of the ether waves of light, but soon recognizes that gas in the bulb plays a role as well. Even in Einstein’s time, this role still has not been explained completely.

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