07/01/13 12:05 CET
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At first glance it doesn’t sound very exciting but a sheet of plexiglass is making waves at Lausanne’s Ecole Polytechnique Fédérale in Switzerland.
When a beam of light is projected through it, an image miraculously appears – in this case a picture of British computer science pioneer Alan Turing.
Scientists have developed a complicated mathematical formula to use the so-called Caustic Effect – the way light is refracted through water – to create images.