stationary waves formation
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Answer:-
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Standing waves are formed by the superposition of two travelling waves of the same frequency (with the same polarisation and the same amplitude) travelling in opposite directions. This is usually achieved by using a travelling wave and its reflection, which will that the frequency is exactly the same.
Unlike a travelling wave, a standing wave does not appear to travel. Each point on the standing wave will oscillate about a point on the axis of the wave. Adjacent points are in phase with each other (sections of the wave flap up and down together), so that points of a particular phase remain at a fixed location as time progresses. Adjacent points each oscillate with a different amplitude. (In a travelling wave, adjacent points all have the same amplitude, but the phase changes along the wave instead). Since adjacent points are in phase, no energy is transferred from one point to the next, unlike a travelling wave.