What Is Light? The Truth Will Change How You See Reality | Neil deGrasse

What is light? Neil deGrasse Tyson explores the strange truth about light, photons, quantum mechanics, wave-particle duality, and the double-slit experiment. Light seems simple—but when physics looks deeper, it becomes one of the strangest mysteries in the universe. In this video, we explore what light really is, how electromagnetic waves work, why photons behave like both waves and particles, and what quantum mechanics reveals about reality. From Maxwell’s equations and Einstein’s special relativity to the photoelectric effect, photons, quantum electrodynamics, and the path integral formulation, this journey explores the fascinating physics behind light. CHAPTERS: 0:00 What Is Light? 1:15 The Wave Nature of Light 3:20 The Ether and Michelson–Morley Experiment 5:15 Maxwell and Electromagnetic Waves 7:30 Einstein and the Speed of Light 9:40 Photons and the Photoelectric Effect 11:50 The Double-Slit Experiment 14:00 Wave-Particle Duality 15:30 Quantum Mechanics and Light 16:20 What Is Light Really? If you enjoy physics, quantum mechanics, astronomy, space, and the mysteries of the universe, subscribe to Cosmic Mind for more science content. #neildegrassetyson #physics #quantummechanics #light #photon #science #universe #astronomy #spacesavingfurniture