Robert Millikan: From Physics Skeptic to Nobel Prize Winner

Summary

Robert Andrews Millikan’s path to becoming a leading physicist began unexpectedly. Born in Morrison, Illinois, in 1868 to a religious family, he initially had little interest in science and excelled in Greek at Oberlin College. When the college needed a physics teacher, a professor recommended Millikan for the job. He accepted for the pay, taught himself the subject, and discovered a lasting passion for physics.

After earning a PhD from Columbia University in 1895, Millikan struggled to find work. On a mentor’s advice, he traveled to Europe, where emerging research into radiation, including X-rays, influenced him. He later returned to the United States and worked with physicist Albert A. Michelson, spending years teaching and writing textbooks.

Millikan’s best-known research addressed the electric charge of an electron. His 1909 oil-drop experiment showed that electric charge occurs in multiples of a fundamental unit, allowing him to measure the electron’s charge. He received the 1923 Nobel Prize in Physics for this work.

Later, Millikan investigated cosmic rays. He believed they were connected to the formation of heavier elements in space, an idea he linked to his belief in a divine creator. Physicist Arthur Compton later showed that cosmic rays are charged particles, contrary to Millikan’s view that they were photons. Millikan continued his scientific work and helped develop the California Institute of Technology into a leading science institution.

Outside the laboratory, Millikan enjoyed golf and tennis. He married Greta Blanchard in 1902, and they had three sons. Their eldest, Clark, became a professor of aerodynamics. The video presents Millikan’s life as an example of how persistence, curiosity, and an unexpected opportunity can lead to major achievements.

Key Method: Millikan’s Oil-Drop Experiment

• Millikan placed tiny oil droplets between metal plates.
• He applied an electric field between the plates and observed the droplets as they fell.
• From the droplets’ motion, he concluded that electric charge comes in multiples of a single elementary charge.
• These measurements enabled him to determine the electron’s charge.

Speakers and Sources Featured

• Narrator: A single voiceover tells Millikan’s biography and explains his research.
• Historical figures mentioned: Albert A. Michelson, Arthur Compton, Greta Blanchard, and Clark Millikan, as well as unnamed professors and scientists. No separate interviewees or other speakers appear in the subtitles.