Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other. In most cases, "distance from A to B" is interchangeable with "distance between B and A".
Read more about Distance: Distance Versus Directed Distance and Displacement, Other "distances"
Famous quotes containing the word distance:
“Under all conditions well-organized violence seems to him the shortest distance between two points.”
—Leon Trotsky (18791940)
“I see nobody on the road, said Alice.
I only wish I had such eyes, the King remarked in a fretful tone. To be able to see Nobody! And at that distance too! Why, its as much as I can do to see real people, by this light!”
—Lewis Carroll [Charles Lutwidge Dodgson] (18321898)
“Remember? We sat on a slab of rock.
From this distance in time,
it seems the color
of iris, rotting and turning purpler,
but it was only
the usual gray rock”
—Robert Lowell (19171977)