Why Light Makes No Sense (Until You Understand Photons)

Hey guys! We’re now live on Spotify🎧 Listen here: https://open.spotify.com/show/3qYsIDs... In 1887, a physicist shut a spark inside a dark box and watched it shrink, and a sheet of glass made all the difference. Years later, brighter light refused to throw electrons out of metal any faster, and a blazing red lamp could not free a single one. How can the same light that ripples like a wave behave like this? Tonight we follow that clue from Karlsruhe to a patent office in Bern to a Chicago vacuum chamber where a sceptic spent ten years testing an idea he called reckless. Get cozy and let this slow walk through the strange physics of light keep you company tonight. Subscribe to Lights Out Physics if you enjoy the long way around the universe. CHAPTERS 0:00 Introduction 1:26 The Spark in the Dark Box 12:36 Light Was Settled 23:34 What Comes Out of the Metal 34:19 Brighter Light, Same Electrons 45:27 The Trigger That Failed 56:02 Planck's Act of Desperation 1:06:55 A Clerk in Bern 1:17:56 The Toll and the Change 1:29:17 Twenty Years of No 1:39:34 The Man Who Tried to Prove Him Wrong 1:50:26 The Prize and the Proof 2:00:52 What a Photon Actually Is 2:13:07 The Light in Your Room SOURCES Nobel Prize in Physics 1921: Albert Einstein, Facts — https://www.nobelprize.org/prizes/phy... Nobel Prize in Physics 1905: Philipp Lenard, Facts — https://www.nobelprize.org/prizes/phy... Millikan, A Direct Photoelectric Determination of Planck's h (Phys. Rev. 1916) — https://link.aps.org/doi/10.1103/Phys... Quantum Milestones, 1916: Millikan's Measurement of Planck's Constant (APS Physics) — https://physics.aps.org/articles/v18/12 Holton, Millikan's Struggle with Theory (Europhysics News) — https://www.europhysicsnews.org/artic... Compton, A Quantum Theory of the Scattering of X-rays by Light Elements (Phys. Rev. 1923) — https://link.aps.org/doi/10.1103/Phys... Quantum Milestones, 1923: Photons Are Real (APS Physics) — https://physics.aps.org/articles/v18/18 December 18, 1926: Gilbert Lewis Coins "Photon" (APS News) — https://www.aps.org/publications/apsn... Schultze et al., Delay in Photoemission (Science 2010) — https://www.science.org/doi/10.1126/s... Tinsley et al., Direct Detection of a Single Photon by Humans (Nature Communications 2016) — https://www.nature.com/articles/ncomm... Why We Should Thank Einstein for Our Smartphone Cameras (NobelPrize.org) — https://www.nobelprize.org/stories/ph... Pal, The Incredibly Strange Story of Einstein's Nobel Prize (arXiv) — https://arxiv.org/abs/2112.13519 https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... https://commons.wikimedia.org/wiki/Fi... — Disclaimer: Lights Out Physics is an education and relaxation channel. Factual material is based on peer-reviewed research and official scientific bodies; any speculation, fringe theory, or personal analysis is identified as such when it appears. This is not a news channel. Viewer discretion advised. #PhotoelectricEffect #WaveParticleDuality