light waves can propagates in vaccum but sound waves can not why ?
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Sound waves cannot propagate through a vacuum because sound waves are mechanical waves. Light waves can propagate through a vacuum because light waves are electromagnetic waves. Since sound waves are longitudinal waves, the particles move in the direction of propagation, therefore these waves cannot be polarised.
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Answer:
coz sound waves needs medium ( air ) to propagate but light can not
Explanation:
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