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How do we know that alternate compressions and rarefactions are formed in air when a sound propagates in air which is just a similar case of formation of compressions and rarefactions in a slinky when a longitudinal wave propagates through the slinky? Is there any experiment to prove the truth of formation of compressions and rarefactions when a sound propagates in air?
Dear student,
together these two elements make up a sound wave, which is what we hear when something is hit or played.
if you look at any normal visual representation of a soundwave, the humps above the middle line are called compression, the humps below, rarefaction.
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Sagar Singh
B.Tech, IIT Delhi
sagarsingh24.iitd@gmail.com
Dear sir
Good noon,
My question actually was how will we prove experimemtally THAT ALTERNATE COMPRESSIONS AND RAREFACTIONS are formed in any material say air when a sound wave travells through the material just like we see in a slinky when we make to vibrate the slinky in a horizonal surface. I hope you will be kind enough to suggest me any experiment. Thanks a lot.
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