Physics for Everyone, Lecture 5: The Unification that Changed the World

Physics for Everyone, Lecture 5: The Unification that Changed the World

July 7, 2026 · 1h 55m

About this episode

Lawrence Krauss discusses a pivotal theoretical development in 19th-century physics that transformed our understanding of the universe and technology.

I began this lecture by saying I was daunted by what I was about to talk about. There are several reasons for this. First, I will lead you through the development of what was certainly most important theoretical development in the 19th century, and what could easily be considered the most important mathematical framework in all of physics. Second, this development affected our modern picture of the universe more than almost any other. Next, this development made our modern technological society possible. And finally, it allowed a calculation that ultimately unveiled the true nature of light. A calculation we will perform together during this lecture I am going to take you through what is often taught in a whole semester course in physics. So hold onto your hats. Take it step by step. I think the reward of understanding will be worth the effort. I hope at the end of this lecture you agree with me. This month I will be traveling with the Origins Project and a group of 27 intrepid travelers to Cyprus and Greece. So the next Origins podcast will not air until August. I hope your July is enjoyable. As always, an ad-free video version of this podcast is also available to paid Critical…

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Host: Lawrence M. Krauss

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Organizations: Origins Project Foundation

Places: Cyprus, Greece

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