Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Physics A pair of separated electric charges or magnetic poles, of equal magnitude but of opposite sign or polarity.
- noun Chemistry A molecule having two such charges or poles.
- noun Electronics An antenna, usually fed from the center, consisting of two equal rods extending outward in a straight line.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics any object (such as a
magnet ,polar molecule orantenna ), that isoppositely charged at twopoints (orpoles ) - noun chemistry any
molecule orradical that hasdelocalised positive andnegative charges - noun radio a
dipole antenna
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a pair of equal and opposite electric charges or magnetic poles separated by a small distance
- noun an aerial half a wavelength long consisting of two rods connected to a transmission line at the center
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Another strategy was to create "electrochromic dyes" with large changes in dipole moment between ground and excited state, so that a change in neuronal membrane potential could shift the peak wavelengths of absorbance or fluorescence4.
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If there is no external field we call the dipole permanent, written as pperm.
Citizendium, the Citizens' Compendium - Recent changes [en] 2008
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I was especially proud of this one I got from South America (on a 40-meter dipole, which is the equivalent of getting Radio Free Europe through the braces in your mouth).
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A common magnet has two poles and is called a dipole, one with four poles, a quadrupole, one with six, a hexapole etc.
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This charge separation, called a dipole moment, wouldn't be strong enough to rip the wandering electron away from the giant atom.
Latest Science News Features, Blog Entries, Column Entries, Issues, Articles and Book Reviews 2010
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The slight magnetism of the rubidium atoms, called a dipole moment, may form the pattern, he says.
Science News / Features, Blog Entries, Column Entries, Issues, News Items and Book Reviews 2009
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The most familiar example of a dipole is a magnet.
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When working, the Galatea tows a device called a dipole transmitter that sends low-frequency electromagnetic signals through the sea floor toward a suspected reservoir.
chron.com Chronicle 2009
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The most common is what's called a dipole antenna, a good example being those T-shaped, plastic covered wires that came with home stereo sets once upon a time.
Nashuatelegraph.com local, state, business and sports news 2009
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The most common is what's called a dipole antenna, a good example being those T-shaped, plastic covered wires that came with home stereo sets once upon a time.
Nashuatelegraph.com local, state, business and sports news 2009
fbharjo commented on the word dipole
a quarter wave-length antenna that is easy to construct
August 19, 2009