The Moiré Effect is an optical phenomenon where two sets of fine lines overlap and move, creating a wavy pattern; this effect is intentionally used as a security feature in banknotes and passports because when counterfeiters attempt to copy these patterns using regular scanners or printers, the overlapping lines produce distorted designs that make fake documents easily detectable.
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#Moiré Effect #educationAjouté :
This strange pattern helps catch fake money. When two sets of fine lines overlap and move, they create a wavy design called the moire effect. The same trick is used in banknotes and passports. If someone tries to copy them with a regular scanner or printer, a distorted pattern appears, making the fake easy to spot. So, this weird-looking effect is actually a smart security feature.
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