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In the figure shown, S(1) and S(2) are t...

In the figure shown, `S_(1)` and `S_(2)` are two identical point sources of sound which are coherent `180^(@)` out of phase. Taking `S_(1)` as centre, two circular arcs `l` and m of radii `1` m and `2 m` are drawn. Taking `S_(2)` as centres, two circular arcs `p` and `q` are drawn having radii `2 m` and `4 m` respectively. Out of the four intersection points A, B, C and D which point will record maximum intensity and which will record the least intensity of sound?
It is given that wavelength of wave produced by each source is `4.0 m`.

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The correct Answer is:
Maximum at C and least at B
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