Question

Complete the following sentences —(a) Sound cannot travel through …………… ; it requires a ……………(b) When sound travels in a medium, the particles of medium …………… but the disturbance……………(c) A longitudinal wave is composed of compression and ……………(d) A transverse wave is composed of crest and ……………(e) Wave velocity = …………… x wavelength

  • Category: Propagation of Sound Waves Class 9 ICSE
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Answer

(a) Sound cannot travel through vacuum ; it requires a medium.

(b) When sound travels in a medium, the particles of medium do not move but the disturbance moves ahead.

(c) A longitudinal wave is composed of compression and rarefaction.

(d) A transverse wave is composed of crest and trough.

(e) Wave velocity = frequency x wavelength

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