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Two sources of sound S1 and S2 vibrate a...

Two sources of sound `S_1 and S_2` vibrate at same frequency and are in phase. The intensity of sound detected at a point P as shown in the figure is `I_0` . (a) If `theta` equals `45^@`, what will be the intensity of sound detected at this point if one of the sources is switched off ? (b) What will be the answer of the previous part if `theta= 60^@` ?

Text Solution

Verified by Experts

The correct Answer is:
`[l_(0)//4]`
Due to symmetry phase difference at P Is zero So waves will constructively interfere at P so intensity at P becomes four times that ofindividual intensity ofeach source. Now if one source is switched off the intensity at P will be only due to remaining source so it will be one fourth ofresulting intensity.
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