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  2. Lensmeter - Wikipedia

    en.wikipedia.org/wiki/Lensmeter

    13 – Prism scale knob. A lensmeter or lensometer (sometimes even known as focimeter or vertometer), [1] [2] is an optical instrument used in ophthalmology. It is mainly used by optometrists and opticians to measure the back or front vertex power of a spectacle lens and verify the correct prescription in a pair of eyeglasses, to properly ...

  3. Sennacherib's Annals - Wikipedia

    en.wikipedia.org/wiki/Sennacherib's_Annals

    Sennacherib's Annals are the annals of the Assyrian king Sennacherib.They are found inscribed on a number of artifacts, and the final versions were found in three clay prisms inscribed with the same text: the Taylor Prism is in the British Museum, the Oriental Institute Prism in the Oriental Institute of Chicago, and the Jerusalem Prism is in the Israel Museum in Jerusalem.

  4. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  5. Murderous Maths - Wikipedia

    en.wikipedia.org/wiki/Murderous_Maths

    Murderous Maths is a series of British educational books by author Kjartan Poskitt.Most of the books in the series are illustrated by illustrator Philip Reeve, with the exception of "The Secret Life of Codes", which is illustrated by Ian Baker, "Awesome Arithmetricks" illustrated by Daniel Postgate and Rob Davis, and "The Murderous Maths of Everything", also illustrated by Rob Davis.

  6. French Bulldog’s Mom Drags Her Along Shopping and She ... - AOL

    www.aol.com/french-bulldog-mom-drags-her...

    Story is an adorable French Bulldog who loves to go shopping with her mom. Her mom posted a video on Tuesday, July 16th of the two of them shopping at the Nordstrom Rack, and only one of them was ...

  7. List of second moments of area - Wikipedia

    en.wikipedia.org/wiki/List_of_second_moments_of_area

    The following is a list of second moments of area of some shapes. The second moment of area, also known as area moment of inertia, is a geometrical property of an area which reflects how its points are distributed with respect to an arbitrary axis. The unit of dimension of the second moment of area is length to fourth power, L 4, and should not ...

  8. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  9. Ray transfer matrix analysis - Wikipedia

    en.wikipedia.org/wiki/Ray_transfer_matrix_analysis

    Multiple prism beam expander using r prisms ( M B 0 1 M ) {\displaystyle {\begin{pmatrix}M&B\\0&{\frac {1}{M}}\end{pmatrix}}} M is the total beam magnification given by M = k 1 k 2 k 3 ··· k r , where k is defined in the previous entry and B is the total optical propagation distance [ clarification needed ] of the multiple prism expander.

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