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yashddsy26
compression and rarefaction are two phenomenon occurs in longitudunal wave!

when there is denser particle gathering in that wave , there we called it compression and the rarer part of particles is rarefaction !
23rasch
Compression is the state of being compressed, or pressed together (forcing into less space)
Rarefaction is the act of becoming less dense.
The two are opposites if that helps.
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