“Millikan Experiment”, “Physics For Secondary Schools”,

“Episode of Series “PSSC physics”. Simplified experiment substituting standard spheres for oil drops; analysis of the charge related to the velocity of the sphere across field of view of microscope emphasises the evidence that charge comes in natural units that are all alike; numerous changes of charge are shown, produced by X-rays.”

“Dr. Alfred G. Redfield performs a simplified Millikan experiment photographed through the microscope. Substituting standard spheres for oil drops, he demonstrates the effect of X-rays and the relationship of the charge to the velocity of the spheres. Professor Francis L. Friedman explains that charge comes in natural units that are all alike, and points out numerous changes of charge.”

“In this educational documentary, Dr. Alfred Redfield conducts experiments inspired by Robert Millikan’s groundbreaking work on the nature of electric charge. The film delves into the concept that electric charge exists in discrete units, or “grains,” which are identical in magnitude. Using an intricate setup involving thick metal plates, a microscope, and charged plastic spheres, Redfield demonstrates the forces acting on these charged particles under various electric conditions. As Redfield meticulously adjusts the charge on the plates and observes the behavior of the particles, he illustrates principles of electromagnetism and gravity. He carefully measures how these particles respond to changes in charge, showcasing that their movements can be quantified and are consistent with the notion of charge being quantized in natural units. Throughout the film, viewers gain insight into both the experimental process and the significant implications of Redfield’s findings, which affirm the existence of elementary units of charge in nature. The documentary effectively blends historical context with practical experimentation, making complex scientific concepts accessible to a broad audience.” (AI Generated from Youtube transcript)