When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:A. `0`B. `pi`C. `pi//2`D. `pi//4`

When a sound wave is reflected from a wall the phase difference betwee

1.	When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:A. `0`B. `pi`C. `pi//2`D. `pi//4`
Answer» Correct Answer - A When a sound wave gets reflected from a rigid boundary , the particles at the boundary are unable to vibrate . Thus , a ref,ected wave is generated which interferes with the oncoming wave to produce zero displacement at the rigid boundary . At these points ( zero displacement) , the pressure variation is maximum . Thus , a reflected pressure wave has the same phase as the incident wave .

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When a sound wave is reflected from a wall the phase difference between the reflected and incident pressure wave is:A. `0`B. `pi`C. `pi//2`D. `pi//4`

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