Jim Al-Khalili explains the experiment that reveals the "central mystery of quantum mechanics": the double slit experiment. Sometimes called the "two-slit" or "Young's" experiment, it demonstrates that matter and energy can display the characteristics of both waves and particles, establishing the principle known as wave-particle duality. Furthermore, it questions the role of the observer in the outcome of events and demonstrates the fundamental limitation of an observer to predict experimental r

Scientists just revealed what a photon actually looks like, and it changes everything. Not a point. Not a sphere. A three-dimensional electromagnetic field rippling through space and time. For decades, we couldn't calculate exactly how light and matter interact. We had to approximate, which limited what we could design. But researchers just cracked the math using a breakthrough called "pseudomode transformation." Now we have exact equations instead of estimates, and that precision unlocks techno

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