The Millikan Experiment (1959)

The film discusses Robert Millikan’s experiments to demonstrate that electric charge exists in discrete units, known as elementary charges. Dr. Alfred Redfield conducts similar experiments using a setup with charged plates and tiny plastic spheres to measure the forces acting on these charged particles. By altering the electric charge on the plates and observing the motion of the spheres, Redfield confirms that charge comes in natural units, always appearing as whole number multiples of a fundamental charge. The experiments reveal that these elementary charges are consistent in size and can be measured through their effects on the spheres’ movement in an electric field.

Keywords
Millikan experiment, elementary charge, electric force, Redfield, charged plates, particles, natural units, discrete charge, measurement, physics

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