Question

Longitudinal waves can be produced in :
(a) solids
(b) liquids
(c) gases
(d) All of the above

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Answer

(d) All of the above

Reason — The wave in which the particles of the medium vibrate about their mean positions, in a direction of propagation of sound, is called a longitudinal wave. Longitudinal waves can be produced in solids, liquids and gases.

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