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:
“It is impossible for a stranger traveling through the United States to tell from the appearance of the people or the country whether he is in Toledo, Ohio, or Portland, Oregon. Ninety million Americans cut their hair in the same way, eat each morning exactly the same breakfast, tie up the small girls’ curls with precisely the same kind of ribbon fashioned into bows exactly alike; and in every way all try to look and act as much like all the others as they can.”
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