what is a standing wave and how is it formed ?

A standing wave is the interference of two sinusoidal waves travelling in opposite directions, confining the wave and its energy to a fixed position, creating nodes and anti nodes .
nodes - points where the displacement is always zero antinode - points where the displacement moves from zero to maximum.
It is formed when two waves are traveling in opposite directions with same frequency, wavelength and amplitude.

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Answered by Danielle N. Physics tutor

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