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2. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   In practice it is considered to be 2× the aperture in millimetres or 50× the aperture in inches; so, a 60 mm diameter telescope has a maximum usable magnification of 120×. [ citation needed ] With an optical microscope having a high numerical aperture and using oil immersion , the best possible resolution is 200 nm corresponding to a ...

3. Photo print sizes - Wikipedia

   en.wikipedia.org/wiki/Photo_print_sizes

   The alternative Super series, denoted SnR, nR Plus or nR+, has an aspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard 135 film (35 mm) at sizes of 8 inches or above. 5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R. 4D/6D is a newer size for most consumer ...

4. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres (⁠ 1 100 ⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimetres. 1 cm – 0.39 inches. 1 cm – edge of a square of area 1 cm 2.

5. AOL Mail

   mail.aol.com

   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

6. List of wars by death toll - Wikipedia

   en.wikipedia.org/wiki/List_of_wars_by_death_toll

   French catholics vs Huguenots: France Korean War: 2.5–3.5 million [43] [26] 1950–1953 North Korea vs. South Korea: Korean Peninsula Vietnam War: 1.1–3.4 million [44] [45] 1955–1975 North Vietnam vs. South Vietnam: Indochina Hundred Years' War: 2.3–3.3 million [46] [47] 1337–1453 House of Valois vs. House of Plantagenet: Western ...

7. Pica (typography) - Wikipedia

   en.wikipedia.org/wiki/Pica_(typography)

   4.2333 mm. The pica is a typographic unit of measure corresponding to approximately 1⁄6 of an inch, or from 1⁄68 to 1⁄73 of a foot. One pica is further divided into 12 points. In printing, three pica measures are used: The French pica of 12 Didot points (also called cicero) generally is: 12 × 0.376 = 4.512 mm (0.1776 in).