CAIE IGCSE Physics 3.4.2 Longitudinal Nature of Sound Waves Questions

Practise recognising sound as longitudinal by comparing air-particle vibration with propagation and interpreting molecule or candle-flame motion diagrams.

Exam points

Identify air particles vibrating parallel to sound travel, interpret compressions and rarefactions as pressure and spacing changes, and distinguish particle oscillation about equilibrium from propagation of the sound disturbance.

[Maximum number: 1]

Fig. 6.1 represents a sound wave of wavelength 0.45 m travelling from left to right.

Fig. 6.1 (not to scale)

Another type of wave that consists of compressions and rarefactions is ultrasound.

State one other similarity between sound of frequency 750 Hz and ultrasound.

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CAIE IGCSE Physics 3.4.2 Longitudinal Nature of Sound Waves Questions question 1