![](http://www.alamy.com/thumbs/6/AEB70825-984F-4A02-9449-AC17637B0A50/2ACWBAC.jpg)
Fresnel on lighthouse lenses. 19th-century diagrams produced by French physicist Augustin Jean Fresnel (1788-1827) as part of his work on lighthouse l
Fresnel on lighthouse lenses. 19th-century diagrams produced by French physicist Augustin Jean Fresnel (1788-1827) as part of his work on lighthouse lenses. Fresnel studied optics and diffraction. He developed a type of lens (the Fresnel lens) for use in lighthouses. A Fresnel lens allows greater projection of light than can be achieved with mirrors. These diagrams, showing a wheel that regulates lighthouse lamp rotation machinery, are from a posthumous collection of his works: 'Oeuvres completes d'Augustin Fresnel' (1870).
Size: 5213px × 3381px
Photo credit: © KING'S COLLEGE LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1700s, 1783, 18th, 87, angiosperm, angiosperms, arbres, arbustes, artwork, biological, biology, botanical, botany, century, damerique, drawing, flora, flower, flowerin, flowering, flowers, herbacees, illustration, nature, plant, plantes, plate, watercolour, william, young