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Millikan's Oil Drop Experiment | Atomic Theory Part 6

2025-06-11

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How did we find the charge & mass of the electron? Millikan found the charge of a single electron in his Oil Drop Experiment. He looked at tiny charged droplets of oil and balanced the downward gravitational force with an upward electrical force, at which point the forces were equal. Using J.J. Thomson's charge-to-mass ratio, he also calculated the mass.

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0:00 History & Overview

0:33 How the Experiment Works

1:50 Millikan's Data & the Charge of the Electron

2:54 Calculating the Mass of the Electron

3:35 Structure of the Atom?

Images:

https://en.wikipedia.org/wiki/File:Millikan.jpg

https://en.wikipedia.org/wiki/File:Millikan%E2%80%99s_oil-drop_apparatus_1.jpg

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History & Overview
/youtube/video/mh2oO1dK5OQ?t=0
How the Experiment Works
/youtube/video/mh2oO1dK5OQ?t=33
Millikan's Data & the Charge of the Electron
/youtube/video/mh2oO1dK5OQ?t=110
Calculating the Mass of the Electron
/youtube/video/mh2oO1dK5OQ?t=174
Structure of the Atom?
/youtube/video/mh2oO1dK5OQ?t=215
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