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:
“Panurge was of medium stature, neither too large, nor too small ... and subject by nature to a malady known at the time as “Money-deficiency,”Ma singular hardship; nevertheless, he had sixty-three ways of finding some for his needs, the most honorable and common of which was by a form of larceny practiced furtively.”
—François Rabelais (1494–1553)
“I stand in the sunny noon of life. Objects no longer glitter in the dews of morning, neither are yet softened by the shadows of evening.”
—Margaret Fuller (1810–1850)
“And now good morrow to our waking souls,
Which watch not one another out of fear;
For love all love of other sights controls,
And makes one little room an everywhere.
Let sea-discoverers to new worlds have gone,
Let maps to other, worlds on worlds have shown,
Let us possess one world; each hath one, and is one.”
—John Donne (1572–1631)