Credit: ©The Royal Society
    Image number: RS.15676

    Diagrams on Alhazen's problem

    Date
    9 April 1672
    Creator
    Christiaan Huygens (1629 - 2006, Dutch) , Natural philosopher
    Object type
    Archive reference number
    Manuscript page number
    p2
    Material
    Dimensions
    height (page): 222mm
    width (page): 165mm
    Subject
    Physics
       > Optics
    Description
    Diagrams demonstrating Christian Huygens's solution to Alhazen's problem, conveyed to Henry Oldenburg in a letter dated 9 April 1672. The demonstration was printed in Philosophical Transactions of the Royal Society, vol. 8, no. 98 (November 1673).

    The problem attributed to Alhazen (the Latinized name of Ibn al-Haytham (965-1045)) is to find a point of reflection on the surface of a spherical mirror in relation to two points, the eye and the visible object.
    Object history
    Printed as R. F. Slusius and C. Huygens, 'Continuation of the optical problem of Alhazen', Phil. Trans. vol. 8, no. 98 (November 1673), pp. 6140-46, figs 1 and 2.
    Related fellows
    Christiaan Huygens (1629 - 2006, Dutch) , Natural philosopher
    Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
    Renatus Franciscus Slusius (1622 - 1685, Belgian) , Mathematician
    Associated place
    <The World>
       > Europe
          > France
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