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:
“no little brass rollers
and small easy wheels on the bottom—
my townspeople what are you thinking of!
A rough plain hearse then
with gilt wheels and no top at all.”
—William Carlos Williams (1883–1963)
“Adultery itself in its principle is many times nothing but a curious inquisition after, and envy of another man’s enclosed pleasures: and there have been many who refused fairer objects that they might ravish an enclosed woman from her retirement and single possessor.”
—Jeremy Taylor (1613–1667)
“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)