What happens when you try to chop a photon in half?

A photon is a particle of light that normally can't be divided. But here's the quantum puzzle: photons aren't actually localized to a single point—they're extended objects spread across space. Ars Technica reports that Norwegian physicists investigated what would happen if you interrupted a photon's reflection by yanking the mirror away mid-bounce. The answer, they discovered, turned out to be far more complex than expected.

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