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magnifying glass |
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magnifying glass: see microscope microscope, optical instrument used to increase the apparent size of an object.
Simple MicroscopesA magnifying glass, an ordinary double convex lens having a short focal length, is a simple microscope. ..... Click the link for more information. . magnifying glass, magnifier a convex lens used to produce an enlarged image of an object magnifying glass traditional detective equipment; from its use by Sherlock Holmes. [Br. Lit.: Payton, 473] See : Sleuthing |
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n Pustules and spores are difficult to see in the field without a high-powered hand lens (20X to 30X); a laboratory test is needed for confirmation. Use a hand lens that is at least 20x, he noted, and hold it to your eye, using your thumb against your cheek to keep it the proper distance. One set of data comes from images taken with the rover's equivalent of a hand lens. |
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