Polarised light patterns. 19th-century diagrams of patterns from experiments on coloured polarised light. Polarised light can be used to measure stres

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Polarised light patterns. 19th-century diagrams of patterns from experiments on coloured polarised light. Polarised light can be used to measure stress in materials and to distinguish minerals and chemicals. For a coloured version of such patterns, see C019/4952. This page is from volume 2 of the 4th edition (1844) of 'Elements de physique experimentale et de meteorologie' by French physicist Claude Servais Mathias Pouillet (1790-1868).

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Photo credit: © KING'S COLLEGE LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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