This result was a direct contradiction to the prevailing notion of continuous charge and became a cornerstone of modern atomic theory. Apparatus and Experimental Setup Millikan's apparatus consisted of a horizontal metal chamber with two parallel plates acting as capacitor plates.
Millikan Oil Experiment Stopwatch Timing Method: Measuring Terminal Velocity for Precise Charge Calculation
Thomson had discovered the electron in 1897, determining its precise charge-to-mass ratio left the fundamental unit of charge, e, unknown. Microscope for visual tracking of individual droplet motion.
Impact and Legacy The Millikan oil experiment resolved a critical debate in physics, providing the definitive measurement of the electron's charge. The Historical Context and Motivation In the late 19th and early 20th centuries, the nature of electricity was fiercely debated.
Millikan Oil Experiment Stopwatch Timing Method: Measuring Droplet Velocity
Key Components and Measurements The experiment required meticulous control and observation. By measuring the terminal velocity of a droplet as it fell under gravity (with the electric field off) and then the voltage required to halt its fall (with the field on), Millikan could calculate the charge on the droplet using the formula qE = mg, where q is charge, E is the electric field, m is mass, and g is gravity.
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