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
• B. Compression
• C. Both (a) and (b)
• D. Sound wave disappears.

Answer 1

The correct option is B Compression

Sound wave goes through phase change by $\pi$, 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.