Why Do We Believe Light Is A Particle?

Our Spotify podcast: https://open.spotify.com/show/5rqQFYd... Right now, without any effort, you are giving off light. Everything warm does, your body, the walls, a cooling cup of tea, all of it glowing in colors too low for the eye to see. For a long time physicists believed they understood that glow completely, until they tried to explain it with their finest theory and the mathematics told them, calmly and precisely, that every warm object in the universe should be pouring out infinite energy. The way out of that impossibility is one of the strangest and least understood stories in all of science, and it ends somewhere you were probably never told, with the discovery that light, the smoothest and most wave-like thing we know, behaves as though it is made of countable pieces. So why do we really believe that light is a particle, and is it the reason you were given in school? Tonight we take the long, patient way through that story, the real one rather than the tidy myth. We stand before the glow of a hot furnace, watch the finest theory in physics predict a catastrophe, follow a reluctant Max Planck as he breaks his own rules, and then walk step by step through the argument by which a young Einstein pulled the particle of light out of pure thermodynamics, out of the entropy of a glow, before he ever mentioned the effect his name is now attached to. We meet the ninety-minute prediction that never comes true, the experimenter who spent a decade trying to prove Einstein wrong and confirmed him instead, and the question that even Einstein, at the end of his life, admitted he could not answer. Get cozy and let this slow walk through the birth of the light quantum keep you company tonight. Subscribe to Sundown Science if you enjoy taking the long way around reality. — Disclaimer: All videos are produced for entertainment and education. Factual claims are sourced from peer-reviewed research and official scientific institutions. Where a video explores speculation, fringe theories, or the creator's own analysis, it is clearly labeled as such. Sundown Science is not a news outlet. Watch at your own discretion. #SundownScience #Physics #QuantumPhysics #Astronomy #ScienceDocumentary #SleepDocumentary #WhatIsLight #Photon #PhotoelectricEffect #Einstein #MaxPlanck #BlackbodyRadiation #UltravioletCatastrophe #WaveParticleDuality #LightQuantum #Entropy #HistoryOfPhysics #ComptonScattering