Small Objects and Maps
Observing a nearby small object without a magnifying glass or a microscope, the optimal distance is 20–25 cm. At this close range, 0.05 mm can be seen clearly. The accuracy of a measurement ranges from 0.1 to 0.3 mm and depends on the experience of the observer. The latter figure is the usual positional accuracy of faint details in maps and technical plans.
Read more about this topic: Naked Eye
Famous quotes containing the words small, objects and/or maps:
“The sin of pride may be a small or a great thing in someone’s life, and hurt vanity a passing pinprick, or a self-destroying or ever murderous obsession.”
—Iris Murdoch (b. 1919)
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Let sea-discoverers to new worlds have gone,
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