Question

When a sound wave is reflected from a rigid wall, the phase difference between the reflected and incident wave

• A. 0
• B. $\pi$
• C. $\pi /2$
• D. $\pi /4$

Answer 1

The correct option is B $\pi$

when a sound wave gets reflected from a rigid wall then it undergoes a phase change of $\pi$ w.r.t. to incident wave.

so the answer is B.