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 ?
beaucoup moins que]Nous avons remedie a ces incoherences et repondu aux doleances des utilisateurs au fur et a mesure[beaucoup plus grand que], a-t-il affirme.
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Only a view of reality which lets reality speak in all its many aspects can avoid these incoherences.
There is excellent work on recognizing deficient theories in terms of logical inconsistency, self-referential incoherence, self-assumptive incoherence, and self-performative incoherence (pp.
En fait, du simple point de vue archeologique, la mise en oeuvre de l'approche socio-archeologique de ce livre laisse quelque peu a desirer; on y recontre plusieurs lacunes, incoherences, contradictions et erreurs.