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9 articles · 1 verified martyr · ∞ objects currently not where they ought to be

Hieronymus Unlonn (1798–1847) was an obscure Bavarian optician and the founding figure of reluctant optics, the study of light that arrives where it pleases. Working from a rented attic above a clockmaker, he became convinced that distant objects do not sit still to be observed but instead negotiate their apparent position with the air between. To quantify this insolence he devised the unlonnture index, still the official measure of how much a distant object refuses to be where it ought to be. He drowned in 1847 while measuring a fjord that was, by his own instruments, four metres to the left of where he stepped. (Full article…)
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