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  2. Magnifying glass - Wikipedia

    en.wikipedia.org/wiki/Magnifying_glass

    A pen seen through a magnifying glass Jim Hutton as detective Ellery Queen, posing with a magnifying glass. A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. A magnifying glass can be used to focus light, such as to concentrate the Sun's radiation to ...

  3. The 20 best gifts for parents of all ages - AOL

    www.aol.com/lifestyle/best-gifts-parents...

    This lighted magnifying glass has a stand and a swing arm to make it easier for parents to keep doing the crafts they love. The magnifying glass provides 10X magnification, and the base can be ...

  4. Dome magnifier - Wikipedia

    en.wikipedia.org/wiki/Dome_magnifier

    A dome magnifier is a dome-shaped magnifying device made of glass or acrylic plastic, used to enlarge words on a page or computer screen. They are plano-convex lenses : the flat (planar) surface is placed on the object to be magnified, and the convex (dome) surface provides the enlargement.

  5. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    Behind each lamp was a back-coated spherical glass mirror, which reflected rear radiation back through the lamp and into the lens. Further samples were installed at Howth Baily, North Foreland, and at least four other locations by 1804. But much of the light was wasted by absorption in the glass. [6] [7]

  6. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    The postage stamp appears larger with the use of a magnifying glass. Stepwise magnification by 6% per frame into a 39-megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea. Magnification is the process of enlarging the apparent size, not physical size, of something.

  7. Burning glass - Wikipedia

    en.wikipedia.org/wiki/Burning_glass

    A makeshift burning glass, using the eyepiece of a telescope, being used to burn a leaf. Burning glasses (often called fire lenses) are still used to light fires in outdoor and primitive settings. [14] Large burning lenses sometimes take the form of Fresnel lenses, similar to lighthouse lenses, [15] including those for use in solar furnaces. [16]

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