A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2022 · Q271 Mark
Two loudspeakers X and Y emit sound waves that are in phase and of wavelength 0.75 m. An observer O is able to stand anywhere on a straight line that passes through X and Y, as shown. The observer stands at a point where the sound waves from X and Y meet in phase. [Figure 27.1] What could be the distances OY and XY? distance OY/m distance XY/m A 1.25 3.50 B 2.00 2.75 C 2.75 2.00 D 3.25 1.50
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A1.25, 3.50
B2.00, 2.75
C2.75, 2.00
D3.25, 1.50
✓ Correct answer
D: 3.25, 1.50
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