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  2. Foucault knife-edge test - Wikipedia

    en.wikipedia.org/wiki/Foucault_knife-edge_test

    Foucault test setup to measure a mirror. The Foucault knife-edge test is an optical test to accurately measure the shape of concave curved mirrors. It is commonly used by amateur telescope makers for figuring primary mirrors in reflecting telescopes. It uses a relatively simple, inexpensive apparatus compared to other testing techniques.

  3. Mirror - Wikipedia

    en.wikipedia.org/wiki/Mirror

    A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...

  4. The 11 Best Bathroom Mirrors to Elevate Your Vanity - AOL

    www.aol.com/11-best-bathroom-mirrors-elevate...

    Here are the best bathroom mirrors of the year. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Mail. Sign in ...

  5. Stadimeter - Wikipedia

    en.wikipedia.org/wiki/Stadimeter

    A stadimeter operator adjusts the lower knob until the top and bottom of the object are aligned, and then reads the corresponding range off the edge of the lower knob through a small magnifying lens.

  6. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    a spoon used to measure an amount of an ingredient, either liquid or dry megger: electrical insulation mercury barometer: Atmospheric pressure micrometer: small distances multimeter: electrical potential, resistance, and current nephoscope: to measure the speed and direction of clouds nephelometer: particle in a liquid odometer: distance ...

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