ERIC HELLER / SCIENCE PHOTO LIBRARY ERIC HELLER / SCIENCE PHOTO LIBRARY
Quasicrystal. Computer model of a quasicrystal generated by the addition of nine equally-spaced particles behaving like waves (showing wave- particle duality). The waves met at the centre of the yellow "sun", producing a quasicrystal. Within the sun the pattern approximates to a mathematical Bessel function; there is regular repetition, concentric circles forming about the centre. As the pattern moves outwards from the sun, this order is lost, with similar structures appearing at irregular intervals. The yellow "slice" is one repeating unit of the pattern. The quasicrystal was modelled by Professor Eric Heller, Harvard University, USA.
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