**Unformatted text preview: **+ + b) Repeating the above for integral values of β , constructive interference occurs at 4.34 m 0.26 m, 0.86 m, 1.84 m, . Note that these are between, but not midway between, the answers to part (a). c) If , 2 λ = h there will be destructive interference at speaker , 2 If . h B λ the path difference can never be as large as 2 λ . (This is also obtained from the above expression for x , with .) and 2 1 = = β x The minimum frequency is then Hz. 86 m) . 4 ( s) m 344 ( 2 = = h v...

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