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Discovering the quantization of the charge of electrons sounds like something you'd be interested in: https://en.wikipedia.org/wiki/Oil_drop_experiment

We did it with several hundred volts (DC, scary) in college and it was pretty fun collecting the data and watching the numbers fall out in excel doing the analysis.

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I remember doing this one and the equipment leaking oil all over me! Not long after that I decided to go more Theoretical…

We also did it in uni, it was very exhausting. And after a full day of measurements noone ever had enough data to see the quantization of the charge of electrons.

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