O-LevelPhysicsWaves5054/11 · Oct/Nov 2021 · Q171 Mark
A water wave on a pond passes into a region where the wave travels more slowly. It then returns to a region where it travels at the original speed. Assume that the frequency of the wave stays constant. Which side-view of the wave is correct?
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.
A[Waveform A: showing a decrease in wavelength in the middle section then back to original]
B[Waveform B: showing an increase in wavelength in the middle section then back to original]
C[Waveform C: showing a decrease in wavelength in the middle section and then further decrease]
D[Waveform D: showing an increase in wavelength in the middle section and then further increase]
✓ Correct answer
A: [Waveform A: showing a decrease in wavelength in the middle section then back to original]
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