In a longitudinal wave, the particles move in _____ to the direction of the wave.
A
parallel manner
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B
perpendicular manner
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C
random manner
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D
parabolic manner
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Solution
The correct option is A parallel manner Longitudinal waves are characterised by the motion of particles of the medium moving in the same direction as of the wave propagation. Particles make a to-and-fro motion and by transferring their momentum to the neighbouring particles. Thus, the particles do not move out of their positions and only the energy is transmitted in the wave propagation.