For The Love Of Physics

Walter Lewin's 2011 memoir-cum-physics primer, co-written with Warren Goldstein and published by Simon & Schuster. Lewin, an MIT astrophysicist who taught introductory physics for 43 years, uses his own life story — his childhood in Nazi-occupied Holland, his discovery of X-ray bursters, the famous pendulum-swinging lecture — as a frame for explaining core physics concepts. The book grew out of his online lectures, which had already been viewed millions of times on MIT OpenCourseWare before his 2014 sexual-harassment revocation of emeritus status.

Gates wrote: "Lewin is an incredible teacher who's passionate about the beauty of physics and its power as a way of looking at the world."

For a founder, the book's value is not the physics content but Lewin's model of teaching as an act of intellectual generosity. The lectures that made him a web star — he would swing from a 50-kilogram pendulum, smash a two-metre glass tube with a hammer, eat a hot dog wired to a capacitor — were designed to create an experience that forced understanding rather than passive observation. That is a product lesson, not a physics lesson: how do you design an interaction that the user cannot walk away from without a changed mental model? Founders building educational products, onboarding flows, or anything that requires someone to understand something difficult should read Lewin for the method, not the equations.