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Oil drops Hole in plate Microscope view (+) The force of gravity pulls drops downward but is opposed by the electric field that pushes the negatively charged drops upward. Source of X rays- X-ray irradiation causes drops to pick up electrons (-) and become Electrically charged plates negatively charged. A Figure 2.5 Millikan's oil-drop experiment to measure the charge of the electron. Small drops of oil are allowed to fall between electrically charged plates. Millikan measured how varying the voltage between the plates affected the rate of fall. From these data he calculated the negative charge on the drops. Because the charge on any drop was always some integral multiple of 1.602 x 10-19 C, Millikan deduced this value to be the charge of a single electron.

Oil drops Hole in plate Microscope view (+) The force of gravity pulls drops downward but is opposed by the electric field that pushes the negatively charged drops upward. Source of X rays- X-ray irradiation causes drops to pick up electrons (-) and become Electrically charged plates negatively charged. A Figure 2.5 Millikan's oil-drop experiment to measure the charge of the electron. Small drops of oil are allowed to fall between electrically charged plates. Millikan measured how varying the voltage between the plates affected the rate of fall. From these data he calculated the negative charge on the drops. Because the charge on any drop was always some integral multiple of 1.602 x 10-19 C, Millikan deduced this value to be the charge of a single electron.

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter2: Atoms And Molecules
Section: Chapter Questions
Problem 2.84PAE: 2.84 Early attempts to arrange the elements often focused on atomic weight. Mendeleev considered a...
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Go Figure Are the masses of the oil drops changed significantly when electrons
accumulate on them?

Oil drops Hole in plate Microscope view (+) The force of gravity pulls drops downward but is opposed by the electric field that pushes the negatively charged drops upward. Source of X rays- X-ray irradiation causes drops to pick up electrons (-) and become Electrically charged plates negatively charged. A Figure 2.5 Millikan's oil-drop experiment to measure the charge of the electron. Small drops of oil are allowed to fall between electrically charged plates. Millikan measured how varying the voltage between the plates affected the rate of fall. From these data he calculated the negative charge on the drops. Because the charge on any drop was always some integral multiple of 1.602 x 10-19 C, Millikan deduced this value to be the charge of a single electron.
Transcribed Image Text:Oil drops Hole in plate Microscope view (+) The force of gravity pulls drops downward but is opposed by the electric field that pushes the negatively charged drops upward. Source of X rays- X-ray irradiation causes drops to pick up electrons (-) and become Electrically charged plates negatively charged. A Figure 2.5 Millikan's oil-drop experiment to measure the charge of the electron. Small drops of oil are allowed to fall between electrically charged plates. Millikan measured how varying the voltage between the plates affected the rate of fall. From these data he calculated the negative charge on the drops. Because the charge on any drop was always some integral multiple of 1.602 x 10-19 C, Millikan deduced this value to be the charge of a single electron.
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