What Happens If You Trap Light Forever? | Elaxior

Can pure light have weight? Imagine a perfectly reflective box. You trap an enormous amount of light inside and seal it shut forever. The photons inside are completely massless - yet the box becomes heavier. This strange result is one of the clearest demonstrations of Einstein's famous equation, E = mc², showing that energy and mass are fundamentally the same thing. But what happens if we keep adding more and more light? As the energy increases, so does the system's gravitational pull. Push the thought experiment far enough, and the trapped radiation collapses under its own gravity, forming a Kugelblitz - a black hole made entirely from light. And that leads us directly into one of the deepest unsolved mysteries in modern physics: the Black Hole Information Paradox. In this video, we explore: • Why light can increase mass • How photon momentum creates inertia • Einstein's mass-energy equivalence • Gravitational effects of trapped radiation • Kugelblitz black holes • Hawking radiation • The Black Hole Information Paradox All animations, simulations, visuals, narration, and editing in this video were created entirely by me. Visuals were built using original code-driven animations and simulations Elaxior • Science, Visualized. Exploring the deepest ideas in physics, mathematics, and the universe through code-driven animation. Written, narrated, animated, and produced entirely by me. Music Attribution: Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://chriszabriskie.com/cylinders/ Artist: http://chriszabriskie.com/ #Physics #BlackHoles #Science #Einstein #Relativity #Cosmology #QuantumPhysics #Kugelblitz #HawkingRadiation #InformationParadox