Foundation
Physics Foundation
Sound
Sound
Question
A sound wave is travelling from east to west. In which direction do the molecules of the air vibrate ?
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Solution
A sound wave is a longitudinal wave where molecules vibrate parallel to the direction of wave propagation. The wave travels from east to west, meaning the energy transfer is in that direction. Therefore, the air molecules themselves vibrate back and forth along the same east-west axis, not perpendicular to it.
Final Answer: West – east