A-LevelPhysicsWaves9702/12 · May/June 2019 · Q231 Mark
The diagram illustrates the position of particles in a progressive sound wave at one instant in time. [Figure 23.1] The speed of the wave is v. P and Q are two points in the wave a distance L apart. What is an expression for the frequency of the wave?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Av / (2L)
Bv / L
C2v / L
DL / v
✓ Correct answer
A: v / (2L)
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