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.

Answered by Danielle N. Physics tutor

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