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About smoke and mirrors
Smoke and mirrors is a classic technique in magical illusions that makes an entity appear to hover in empty space. It was documented as early as 1770 and spread widely after its use by the charlatan Johann Georg Schröpfer, who claimed to conjure spirits. It subsequently became a fixture of 19th-century phantasmagoria shows. The illusion relies on a hidden projector whose beam reflects off a mirror into a cloud of smoke, which in turn scatters the beam to create an image.
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