When longitudinal waves are reflected fr...

When longitudinal waves are reflected from the surface of a rarer medium?

A

Compression is reflected as rarefactrion without phase change.

B

compression is reflected as rarefaction with phase change of `pi rad `

C

rarefaction is reflected as rarefaction without phase change

D

rarefaction is reflected as rarefaction with a phase change of `pi rad`

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The correct Answer is:

D

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