Why Can't Light Escape Gravity... If It Has No Mass?

For centuries, we were taught that gravity is a mechanical force—an invisible tether that pulls heavy objects together. According to the strict laws of classical physics, if an object has absolutely no mass, gravity should not be able to touch it. So, how does a supermassive black hole trap a completely massless beam of light? In this cinematic documentary, we dismantle the comforting illusions of classical mechanics and explore the terrifying, mind-bending reality of Albert Einstein's General Relativity. We journey from the fundamental paradox of Isaac Newton to the warped, mutilated geometry of an event horizon, discovering that gravity isn't a pulling force at all. It is the invisible, unbending architecture of the cosmos. Subscribe to Physics By Light to continue exploring the dark, beautiful, and terrifying realities of science, philosophy, and the universe. Chapters: 00:00 The Newtonian Lie – The Paradox of Mass 12:08 The Ultimate Escape Artist – Why Light Should Be Untouchable 24:00 Einstein’s Revelation – The Fabric of Reality 38:43 The Geodesic – Falling in a Straight Line 52:38 The Event Horizon – The Geometry of No Return 01:04:54 The Payoff – The Shape of Fate #BlackHoles #GeneralRelativity #Astrophysics #Spacetime #Cosmology #Einstein #PhysicsByLight #ScienceDocumentary #TheoreticalPhysics #SpaceMysteries #ExistentialScience