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S(1) and S(2) are two sources of sound e...

`S_(1)` and `S_(2)` are two sources of sound emitting sine waves. The two sources are in phase. The sound emitted by the two sources interfers at point `F`. The waves of wavelength :

A

1 m will result in constructive interference

B

`2/3` m will result in constructive interference

C

2 m will result in destructive interference

D

4 m will result in destructive interference

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A, B, D
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