incoherent

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in·co·her·ent

(in'kō-hēr'ent),
Not coherent; disjointed; confused; denoting a lack of connectedness or organization of parts during verbal expression.
[L. in- neg. + co-haereo, pp. -haesus, to cling together, fr. haereo, to stick]

incoherent

[in′kōhir′ənt]
Etymology: L, in, not, cohaere, to hold together
1 disordered; without logical connection; disjointed; lacking orderly continuity or relevance.
2 unable to express one's thoughts or ideas in an orderly, intelligible manner, usually as a result of emotional stress.

incoherent

(ĭn″kō-hē′rĕnt)
Not coherent or understandable.

coherent sources 

If light beams from two independent sources reach the same point in space, there is no fixed relationship between the phases of the two light beams and they will not combine to form interference effects. Such light waves are called incoherent. If, on the other hand, the two light beams are superimposed after reaching the same point by different paths but are both radiated from one point of a source, interference effects will be seen because the phase difference in the two beams is constant. The two virtual sources from which these two beams are apparently coming are called coherent sources and any rays in which there is a constant phase difference are called coherent rays. Prior to the advent of the laser, the only way in which one could obtain coherent rays was by dividing the light coming from a point source into two parts. See Young's experiment; holography; clinical maxwellian view system; optical coherence tomography.
References in periodicals archive ?
Le compte rendu du ministre du Commerce a permis de mettre en exergue "les incoherences qui caracterisent le fonctionnement de certaines filieres dont les produits sont eligibles a l'exportation", note le communique.
As he again unpacks this talk for some incoherences and especially for concealed allegiance to a regulatory Shakespeare, Worthen is largely benevolent in his skepticism, granting serious purposes to self-descriptions and analyses of the actors, though sometimes noting their interpretive vulnerabilities - for instance, that the "eclectic feel" of some of their justifications and performances reminds one of that in the new historicism.
That is, in attempting to project onto the expanding empire a variety of fantasies, numerous romantic writers involved themselves in a sequence of insoluble contradictions which surface in recurrent themes hitherto too often overlooked, or even dismissed as private incoherences.
Only a view of reality which lets reality speak in all its many aspects can avoid these incoherences.
We ought, Sedgwick feels, to use her reflections on sexual epistemology to look into such cultural dualisms as private and public, masculine and feminine, innocence and initiation, natural and artificial, the better to see how the incoherences within these oppositions make us the prey of discipline.