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Article by:Ouma George,Awel Eshetu and Bassein Natalia

Coherence and Interference

Ø Introduction
Coherence and Interference are two ideal wave features that complement each other.The wave interference  do occur but for it  to be considered constructive interference,it  needs the coherence of some  of  the physical quantities of the waves involved; the wavelength, amplitude, and phase of the constituent wave forms must be identical.The most distinct concept of coherence in waves requires that  the wave  are in  phase,their peaks are alinged with each other. 

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