PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY
Unmasked", a so-called soap painting at the Musee de la Villette. The 'painting' is in fact a large soap film, the colours being caused by interference patterns of the light reflected from its surface. The film was made from a soap solution containing some glycerine. This makes the film resilient enough to allow the visitors to put their fingers through it without the film breaking. Unmasked" was part of a science exhibition at the museum in Paris during 1990.
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