placed side by side a distance d 34.00 m a wo loudspeakers are part A listener o

Question

placed side by side a distance d 34.00 m a wo loudspeakers are part A listener observes maximum constructive interference while standing in front of the loudspeakers, equidistant from both of them. The distance from the listener to the point halfway between the speakers isi 5.00 m. One of the loudspeakers is then moved directly away from the other. Once the speaker is moved a distance r* 50.0 cm from its original position, the listener, who is not moving, observes destructive interference for the first time. Find the speed of sound vin the air if both speakers emit a tone of frequency 700 Hz Figure t V of 1 d/2

Explanation / Answer

(a) r1 = square root (d/2)^2 + l^2

= square root (4/2)^2 + 5^2

= squre root (29)

= 5.385 m

r2 = square root (d/2+r)^2 + l^2

= square root (4/2+0.60)*2 + 5^2

= 5.636 m

(b) Initially, that means when there is no movement of upper sphere
  
the listerner observes constructive interference and hence phase difference
  
between two speakers will be 0 degree

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