Question

what is vibrational motion ???​

Answer 1

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$\large{\underline{\underline{\mathbf{Vibrational \: motion:-}}}}$

★ When particle have to and fro motion about a mean position, the motion is called vibrational motion.

$\implies$ this motion is maximum in solid as the particle are held in rigid structures.

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Answer 2

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!!•••••••☆☆ANSWER ☆☆•••••••!!

a periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear)

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