602 times 10 to the power of negative 19 coulombs, earned him the Nobel Prize in Physics in 1923 and cemented the experiment's place as a cornerstone of modern physics. The X-rays ionized the air, causing electrons to attach to the falling oil droplets.
Millikan Oil Drop Experiment X Ray Ionization and Electron Charge Measurement
Furthermore, the precise determination of the electron's charge allowed scientists to calculate other critical constants, such as Avogadro's number, linking the microscopic world of atoms to the macroscopic world we observe daily. Millikan and his graduate student Harvey Fletcher embarked on an experiment that would forever change our understanding of the subatomic world.
To create the droplets, an atomizer was used to introduce oil into the chamber, where they became charged through friction or exposure to X-rays. 5924 times 10 to the power of negative 19 coulombs.
Millikan Oil Drop Experiment X Ray Ionization
The key innovation was the ability to adjust the voltage to find the exact "balance voltage" that stopped a specific droplet from moving, effectively freezing it in place for measurement. This equilibrium provides a precise mathematical relationship where the electric force equals the gravitational force.
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