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A20. Two identical sound sources emit sound waves of wavelength 2 and are separated by a distance d. What is the lowest non-zero value of d for which constructive interference occurs everywhere along the line that passes through the two sources? Consider only points which do not lie between the two sources. A. 2 B. λ/4 С. 2 D. λ/2 E. 4λ

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SLO 27 그 Considen a point f just outsida te too sosuex Corv lition.por Constructive interference AL_n.k where n isinfege lve

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