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4(b)(ii)1 mark

Circular water waves are produced by vibrating dippers at points P and Q vibrating in phase with a period of 1.5 s producing waves of speed 4.0 cm s⁻¹. Distance PR is 44 cm and distance QR is 29 cm.

Calculate the path difference at point R of the waves from P and Q. Give your answer in terms of the wavelength λ of the waves.

9702/02/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 2 · Question 4(b)(ii)

Fig. 4.1 — see the question text for what it shows

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Suggested time: 2 min