(Solved): In Fig. 3, sound waves A and B, both of wavelength \lambda , are initially in phase and traveling ri ...

In Fig. 3, sound waves

and

, both of wavelength

, are initially in phase and traveling rightward, as indicated by the two rays. Wave

is reflected from four surfaces but ends up traveling in its original direction. What multiple of wavelength

is the smallest value of distance

in the figure that puts

and

exactly out of phase with each other after the reflections? (10 points) Figure 3