A-LevelPhysicsMedical physicsFeb/Mar 2020Paper 4 Q48 Marks
4 (a) (i) Explain why ultrasound used in medical diagnosis is emitted in pulses. (ii) Explain the principles of the detection of ultrasound waves used in medical diagnosis. (b) The specific acoustic impedances Z of some media are given in Table 4.1. [Table 4.1]
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