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Propagation of Sound Waves — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSPropagation of Sound Waves2 Marks
Question
What is a longitudinal wave? In which medium: solid, liquid or gas, can it be produced?
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Answer

A type of wave motion in which the particle displacement is parallel to the direction of wave propagation is called a longitudinal wave. It can be produced in solids, liquids as well as gases.

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