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:
“A small town is automatically a world of pretense. Since everyone knows everyone else’s business, it becomes the job of the populace to act as if they don’t know what is going on instead of its being their job to try to find out.”
—Jeanine Basinger (b. 1936)
“All objects look well through an arch.”
—Herman Melville (1819–1891)
“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)