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\[90{}^\circ \]
Correct Answer: B
Solution :
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.
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