Ciro Santilli
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Oil drop experiment | 🗖 nosplit | ↑ parent "Electron charge" | 92

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Clear experiment diagram which explains that the droplet mass determined with Stoke's law:
Video 40. "Quantum Mechanics 4a - Atoms I" published by ViaScience on 2013-01-14. Source.
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American Scientific, LLC sells a ready made educational kit for this: https://www.youtube.com/watch?v=EV3BtoMGA9c
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Here's some actual footage of a droplet on a well described more one-off setup:
Video 41. "Millikan's Experiment, Part 2: The Experiment" by Phil Furneaux from Lancaster University published Feb 3, 2017. Source.
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This American video likely from the 60's shows it with amazing contrast: https://www.youtube.com/watch?v=_UDT2FcyeA4
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