Two coherent point sources S1 and S2 emit sound of frequency 80 Hz. Source S1 starts emitting sound 1/960 second after the start

Two coherent point sources S₁ and S₂ emit sound of frequency 80 Hz. Source S₁ starts emitting sound 1/960 second after the start of S_{2 .} Both sources are at same phase when started. If intensity due to each source at the position of detector is I₀ , then the resultant intensity observed by the detector shown in figure is : (speed of sound = 320 m/s)

(A) I₀

(B) 2 I₀

(D) 4I0

Two coherent point sources S1 and S2 emit sound of frequency 80 Hz. Source S1 starts emitting sound 1/960 second after the start of S2 .

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