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  2. Lens (hydrology) - Wikipedia

    en.wikipedia.org/wiki/Lens_(hydrology)

    A freshwater lens on an island. In hydrology, a lens, also called freshwater lens or Ghyben-Herzberg lens, is a convex layer of fresh groundwater that floats above the denser saltwater and is usually found on small coral or limestone islands and atolls.

  3. Saltwater intrusion - Wikipedia

    en.wikipedia.org/wiki/Saltwater_intrusion

    The GhybenHerzberg ratio states that, for every meter of fresh water in an unconfined aquifer above sea level, there will be forty meters of fresh water in the aquifer below sea level. In the 20th century the vastly increased computing power available allowed the use of numerical methods (usually finite differences or finite elements ) that ...

  4. File:Chromatic aberration lens diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Chromatic_aberration...

    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

  5. images.huffingtonpost.com

    images.huffingtonpost.com/2012-05-14-PA1.pdf

    %PDF-1.4 %âãÏÓ 6 0 obj > endobj xref 6 120 0000000016 00000 n 0000003048 00000 n 0000003161 00000 n 0000003893 00000 n 0000004342 00000 n 0000004557 00000 n 0000004733 00000 n 0000005165 00000 n 0000005587 00000 n 0000005635 00000 n 0000006853 00000 n 0000007332 00000 n 0000008190 00000 n 0000008584 00000 n 0000009570 00000 n 0000010489 00000 n 0000011402 00000 n 0000011640 00000 n ...

  6. Ghyben-Herzberg lens - Wikipedia

    en.wikipedia.org/?title=Ghyben-Herzberg_lens&...

    Lens (hydrology) From a page move : This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.

  7. File:Gaussian Beam and Lens Diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Gaussian_Beam_and...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  8. Geometrical optics - Wikipedia

    en.wikipedia.org/wiki/Geometrical_optics

    The focal length f is considered negative for concave lenses. Incoming parallel rays are focused by a convex lens into an inverted real image one focal length from the lens, on the far side of the lens. Incoming parallel rays are focused by a convex lens into an inverted real image one focal length from the lens, on the far side of the lens

  9. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    Diagram of a simple microscope. There are two basic types of optical microscopes: simple microscopes and compound microscopes. A simple microscope uses the optical power of a single lens or group of lenses for magnification. A compound microscope uses a system of lenses (one set enlarging the image produced by another) to achieve a much higher ...

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