How much farther to the right must the obstacle be moved if the two waves are to be out of phase by 11/10 wavelength, so destructive interference occurs? (Assume A<<< 1, d.) (Figure 1) Express your answer in terms of the variables A, I, and d. Ad= 175) ΑΣΦ BWO ? 712
How much farther to the right must the obstacle be moved if the two waves are to be out of phase by 11/10 wavelength, so destructive interference occurs? (Assume A<<< 1, d.) (Figure 1) Express your answer in terms of the variables A, I, and d. Ad= 175) ΑΣΦ BWO ? 712
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Transcribed Image Text:A source of sound waves (wavelength A) is a distance I from a detector. Sound reaches the detector directly, and
also by reflecting off an obstacle, as shown in the figure. The obstacle is equidistant from source and detector.
When the obstacle is a distance d to the right of the line of sight between source and detector, as shown, the two
waves arrive in phase.
Figure
Detector
Source
Obstacle
1 of 1
Transcribed Image Text:How much farther to the right must the obstacle be moved if the two waves are to be out of phase by
wavelength, so destructive interference occurs? (Assume X << 1, d.)
(Figure 1)
Express your answer in terms of the variables A, I, and d.
Ad=
|Π| ΑΣΦ
EWA
?
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