= Oil drop experiment
{wiki}
Clear experiment diagram which explains that the droplet mass determined with https://en.wikipedia.org/wiki/Stokes%27_law[Stoke's law]:
\Video[http://youtube.com/watch?v=Y6XSK4tX6Gg]
{title=Quantum Mechanics 4a - Atoms I by <ViaScience> (2013)}
American Scientific, LLC sells a ready made educational kit for this: https://www.youtube.com/watch?v=EV3BtoMGA9c
Here's some actual footage of a droplet on a well described more one-off setup:
\Video[http://youtube.com/watch?v=_683PGqG1M4]
{title=Millikan's Experiment, Part 2: The Experiment by Phil Furneaux (2017)}
{description=From Lancaster University}
This American video likely from the 60's shows it with amazing contrast: https://www.youtube.com/watch?v=_UDT2FcyeA4[]