CAPE Physics Unit 1 · 2007 · Paper 1 · Question Q22

Two sources of sound, X and Y, that are in phase are positioned as shown in the diagram. They both produce waves with wavelength 2\text{ m} and amplitude A. What would be the amplitude of the sound observed at point P?

1. (A)\frac{1}{2} A
2. (B)2 A
3. (C)0
4. (D)A

This question uses a figure or table from the paper — you'll see it when you practise.