stackyFACTSWhen standard rulers are not pretentious enough, scientists use overlapping light beams to measure the impossible. Interferometers split a beam, send it down two paths, and recombine it to see how the waves clash. It is so sensitive it can detect a change smaller than a single atom, making your tape measure look pathetic.
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Because pesky atmospheric air molecules would constantly crash into the high-speed electron barrage, the entire sample chamber must be sucked completely dry…
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