A source is approaching towoed a wall as shown in figure .We have three observes O_(1),O_(2) and O_(3). observer O_(2) is over the source itself . Let f_(1),f_(2)and f_(3) be the beat frequencires heard byO_(1),O_(2) and O_(3) between direct sound from the source and reflected sound from the wall . then

A source is approaching towoed a wall as shown in figure .We have thre

1.	A source is approaching towoed a wall as shown in figure .We have three observes O_(1),O_(2) and O_(3). observer O_(2) is over the source itself . Let f_(1),f_(2)and f_(3) be the beat frequencires heard byO_(1),O_(2) and O_(3) between direct sound from the source and reflected sound from the wall . then
Answer» (a)`f_(3)=0 `f_(1)GT f_(2)` both(a) and (b) are WRONG both (a) and (b) are correct Answer :D