Question

Standing waves can be produced

• A. on a string clamped at both ends
• B. on a string clamped at one end and free at the other
• C. when incident wave gets reflected from a wall
• D. when two identical waves with a phase difference of $\pi $ are moving in the same direction

Answer 1

Answer: (A), (B), (C)

Standing waves can be produced only when two similar type of waves (same frequency and speed, but amplitude may be different) travel in opposite directions.