Question

sound waves need........ medium for propagation

Answer 1

In contrast, electromagneticwaves require no medium, but can still travel through one. Since a vacuum is defined as lacking a medium, thensound and correspondingly, mechanical waves, cannot propagate through a vacuum. This is why we can't hear voices or sounds in space.

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Answer 2

HEY!!!

THE ANSWER SHOULD BE:

Sound waves need material medium for propagation.

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