Question

Standing waves are formed on a string when interference occurs between two waves having:

• A. the same amplitude travelling in the same direction with no phase difference between them
• B. the same amplitude, travelling in the opposite direction with no phase difference between them
• C. different amplitudes travelling in the same direction
• D. different amplitudes travelling in the opposite direction
• E. the same amplitude travelling in the same direction with a phase difference of $90{}^{\circ }$

Answer 1

Answer: (B)

When two identical transverse or longitudinal progressive waves travel in a bounded medium with the same speed, but in opposite directions, then by their superposition a new type of wave is produced which appears stationary m the medium. Thus, is called stationary wave.