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:
“Little Jesus, wast Thou shy
Once, and just so small as I?
And what did it feel like to be
Out of Heaven, and just like me?”
—Francis Thompson (1859–1907)
“The familiar material objects may not be all that is real, but they are admirable examples.”
—Willard Van Orman Quine (b. 1908)
“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)