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A Physicist’s blog on Instagram: "In 2013, published in PhysicsWorld, Physicists from the University of Nebraska–Lincoln and the Perimeter Institute had successfully realized the most faithful laboratory version yet of Richard Feynman’s famed double‑slit thought experiment. While earlier experiments demonstrated single‑electron interference using devices like biprisms, this new setup employs an actual double‑slit—fabricated in a gold‑coated silicon membrane with each slit measuring 62 nm wide an