Here's something new: a microscope that uses the properties of quantum entanglement.The researchers at Hokkaido University in Japan say it "works by focusing two beams of photons into spots next to each other on a flat sample and measuring the interference pattern they create after they have been reflected. When both spots hit a flat part of the sample, they travel the same path length and create a corresponding interference pattern. But when the spots hit areas of different heights, the interference pattern changes".
Who says that physics isn't useful?
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