By observing the motion of tiny oil droplets suspended in an electric field, Millikan transformed an abstract concept into a tangible, calculable value that continues to underpin electromagnetic theory. He accounted for the slight drag effect on small particles using a correction factor derived from kinetic theory, a detail that significantly improved precision.
Millikan Oil Experiment Quantized Charge Discovery
Additionally, he used a radioactive source to ionize the air, ensuring consistent and measurable charging of the droplets. 602 times 10 to the power of negative 19 coulombs.
By timing how long a droplet took to fall a known distance under gravity and how long it took to rise under the applied voltage, he determined the charge. The principles involved also find application in modern fields such as aerosol science and air ion measurement, demonstrating the enduring relevance of the original setup.
Millikan Oil Experiment Quantized Charge Discovery
The experiment became a cornerstone of modern physics, influencing the development of quantum theory and solidifying Millikan’s Nobel Prize in Physics in 1923. The Scientific Principle Behind the Oil Experiment The foundation of the procedure lies in balancing gravitational and electrostatic forces on a microscopic droplet.
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