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Coherence and Interference

Ø Introduction

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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 aligned with each other. 
Interference

Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium.

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