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:
“Y’know, George, I feel that in a small way we’re doing something important. It’s satisfying a fundamental urge. It’s deep in the race for a man to want his own roof and walls and fireplace. And we’re helping him get those things in our shabby little office.”
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“Women have seldom sufficient employment to silence their feelings; a round of little cares, or vain pursuits frittering away all strength of mind and organs, they become naturally only objects of sense.”
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“And at least you know
That maps are of time, not place, so far as the army
Happens to be concerned—the reason being,
Is one which need not delay us.”
—Henry Reed (1914–1986)