February/March 2026 Paper 22

2026 · 40 questions · 40 parts · 40 marks

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24Sound Doppler EffectMedium1 mark
The diagrams show four different sound waves as represented by an oscilloscope. The scales are the same in all the diagrams.
four oscilloscope traces against time: A a low, closely spaced wave; B a tall wave at the same spacing as A; C a tall wave starting high then more widely spaced; D a low wave more closely spaced than A
Which sound has the lowest pitch?