A-LevelPhysicsWavesOct/Nov 2018Paper 2 Q47 Marks
(a) Sound waves are longitudinal waves. By reference to the direction of propagation of energy, state what is meant by a longitudinal wave. (b) A stationary sound wave in air has amplitude A. In an experiment, a detector is used to determine A². The variation of A² with distance x along the wave is shown in Fig. 4.1. [Figure 4.1]
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