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Question

What happens when a sound wave is reflected from the boundary of a denser medium? The compression of the incident wave is returned as a

A
Rarefaction
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B
Compression
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C
Both (a) and (b)
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D
Sound wave disappears.
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Solution

The correct option is B Compression
Sound wave goes through phase change by π, when reflected from the boundary of a denser medium.
Hence, the compression of the incident wave is returned as a compression.

Thus, option (b) is the correct answer.

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