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:
“The confirmation of Clarence Thomas, one of the most conservative voices to be added to the [Supreme] Court in recent memory, carries a sobering message for the African- American community.... As he begins to make his mark upon the lives of African Americans, we must acknowledge that his successful nomination is due in no small measure to the support he received from black Americans.”
—Kimberly Crenshaw (b. 1959)
“I do not know that I meet, in any of my Walks, Objects which move both my Spleen and Laughter so effectually, as those Young Fellows ... who rise early for no other Purpose but to publish their Laziness.”
—Richard Steele (1672–1729)
“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)