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:
“By nature, by necessity itself, [primitive man] is encyclopedic, while civilized man finds himself confined in the infinitely small regions of specialization.”
—Charles Baudelaire (1821–1867)
“Words express neither objects nor ourselves.”
—Johann Wolfgang Von Goethe (1749–1832)
“The faces of most American women over thirty are relief maps of petulant and bewildered unhappiness.”
—F. Scott Fitzgerald (1896–1940)