Double-Slit Experiment & Wave-Particle Duality Explained in Simple Words
By Science ABC
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The double-slit experiment and wave-particle duality, explained in simple words. Why does an electron behave like a wave when you don't watch it, and like a particle the moment you do? In this video, I have walked through Thomas Young's 1801 sunlight experiment, electrons that interfere with themselves, the "observer effect," and why Richard Feynman called this single setup "the only mystery" of quantum mechanics. Whether you're a curious student, a physics enthusiast, or someone who just wants to finally understand what quantum weirdness actually means, this explainer covers the experiment, the history, and the technologies it powers — electron microscopes, MRI scanners, lasers, transistors, and quantum computers. CHAPTERS: 0:00 – Introduction 0:38 – Tennis Balls vs Water Waves: A Simple Analogy 1:19 – Thomas Young's 1801 Experiment with Light 1:51 – Einstein, de Broglie, and Matter Waves 2:23 – Firing Single Electrons, One at a Time 2:52 – The Detector Changes Everything 3:24 – Rea
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