The History of Physics Podcast

In the industrial heart of Manchester, James Prescott Joule used a simple paddle wheel to prove that mechanical work could be converted into heat—shattering the caloric theory and laying the groundwork for energy conservation. This episode traces his meticulous experiments, the scientific debate they sparked, and their lasting impact on thermodynamics and modern physics.

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Explore how a simple glass prism split white light and ignited one of physics’ earliest battles—whether light was a particle or a wave. Follow the rivalry between Christiaan Huygens and Isaac Newton, their experimental insights, and the lasting impact on modern optics.

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Explore how James Clerk Maxwell’s 1867 thought experiment challenged the second law of thermodynamics, sparking debates that led to Landauer’s principle, Szilard’s model, and modern experiments on information engines. The episode traces the journey from a private letter to the heart of modern statistical physics and quantum computing.

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In this episode we follow James Prescott Joule’s 1840s experiment in a Manchester brewery cellar that proved mechanical work could be converted into heat, collapsing the caloric theory and establishing energy conservation as a universal law. We explore how his meticulous measurements, debates with contemporaries such as Lord Kelvin, and advances in thermometry forged the first law of thermodynamics—an insight that still underpins modern physics and engineering.

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In 1543, Nicolaus Copernicus proposed a heliocentric model that displaced Earth from center of the universe. This episode traces how his bold idea challenged centuries of geocentrism, drew on earlier Greek and Arabic insights, and set the stage for Tycho Brahe’s data, Kepler’s laws, and Newton’s gravity—showing how observation limits, instrument technology, and cultural expectations converged to shift physics’ trajectory.

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In this episode we follow Al‑Biruni as he climbs a peak in the 11th century to measure how steeply the horizon drops, arriving at an Earth radius within a percent of modern values. We explore his instruments, the challenges of refraction and terrain, and how his work bridged astronomy and geodesy, laying groundwork for future satellite navigation.

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In this episode we trace how Ibn al‑Haytham’s pinhole experiment shattered the ancient eye‑beam theory, how Vera Rubin’s galaxy rotation curves uncovered hidden mass, and how Penzias & Wilson’s accidental hiss confirmed the cosmic microwave background—showing that careful observation can rewrite physics.

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In this episode we dive into Nicole Oresme’s pioneering speed‑time diagram from the 14th century—long before Cartesian coordinates—showing how a medieval bishop visualized acceleration and laid groundwork for modern physics. We trace his sketching of motion, the debates it sparked in Paris, and its influence on Galileo, Descartes, and Newton.

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This episode traces the 17th‑century rivalry between Isaac Newton and Gottfried Wilhelm Leibniz over the invention of calculus, and how their competing notations laid the groundwork for the language of modern physics. From fluxions to symbolic integrals, we explore why that debate still echoes in today’s equations, computational tools, and the way physicists think about motion.

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When Tycho Brahe observed a bright streak in 1577, his precise measurements challenged Aristotle’s crystalline heavens and paved the way for Kepler’s planetary laws. This episode unpacks how one comet disrupted ancient metaphysics, reshaped data collection, and set physics on a new trajectory.

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