question_answer

Two point coherent sources of power \[{{P}_{0}}\] and \[4{{P}_{0}}\] emitting sound of frequency \[150\text{ }Hz\]are kept at points A and B respectively. Both sources are in same phase. A detector is kept at C as shown in figure. The distance of point A and B is r and \[4r\] from detector respectively. The speed of sound in medium is\[300\text{ }m/s\]. Given \[{{P}_{0}}=64\pi \]watt and\[r=1\text{ }m\]. The intensity observed by detector is\[4N\text{ }watt/{{m}^{2}}\]. Find the value of N.

Answer:

1