A-LevelPhysicsWaves9702/12 · Feb/Mar 2019 · Q231 Mark
The top row of bars represents a set of particles inside the Earth and at rest. The lower row represents the same particles at one instant as a longitudinal wave passes from left to right through the Earth. [Figure 23.1] What should be measured to determine the amplitude of the oscillations of the particles in the lower row as the wave passes?
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Ahalf the maximum displacement of the particles from their position at rest
Bhalf the maximum distance apart of the particles
Cthe maximum displacement of the particles from their position at rest
Dthe maximum distance apart of the particles
✓ Correct answer
C: the maximum displacement of the particles from their position at rest
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