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:
“Where no great fish venture
nor small fish glitter and dart,
only the anemones and flower
of the wild sea-thyme
cover the silent walls
of an old sea-city at rest.”
—Hilda Doolittle (1886–1961)
“There is a very remarkable inclination in human nature to bestow on external objects the same emotions which it observes in itself, and to find every where those ideas which are most present to it.”
—David Hume (1711–1776)
“Living in cities is an art, and we need the vocabulary of art, of style, to describe the peculiar relationship between man and material that exists in the continual creative play of urban living. The city as we imagine it, then, soft city of illusion, myth, aspiration, and nightmare, is as real, maybe more real, than the hard city one can locate on maps in statistics, in monographs on urban sociology and demography and architecture.”
—Jonathan Raban (b. 1942)