# Two point coherent sources of power P_(0) nad 4P_(0) emmitting sound of frequency 150 Hz are kept at point A and B respectively. Both sources are in

16 views
in Physics
Two point coherent sources of power P_(0) nad 4P_(0) emmitting sound of frequency 150 Hz are kept at point A and B respectively. Both sources are in same phase. A detector is kept at point C as showin in figure. The distance of point A and B is r and 4r form detectro respectively. The speed of sound in medium is 300 m/s . Given P_(0)=64pi Watt and r=1m. The intensity observed by detector is

A. 25W//m^(2)
B. 4W//m^(2)
C. 9W//m^(2)
D. zero

by (73.0k points)