A standing wave always has a node at...
Question
A standing wave always has a node at...
Solution
...the fixed ends of the medium in which it is formed.
To elaborate step by step:
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Understanding Standing Waves: A standing wave is a wave that remains in a constant position. This phenomenon occurs due to the interference of two waves traveling in opposite directions with the same frequency and amplitude.
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Nodes and Antinodes: In a standing wave, nodes are points where the wave has zero amplitude, meaning there is no movement at these points. Antinodes are points where the wave has maximum amplitude.
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Formation of Nodes: Nodes are formed at points where the two interfering waves cancel each other out completely. This typically happens at the fixed ends of the medium, such as the ends of a string or the closed ends of an air column.
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Fixed Ends: In many physical systems, such as a vibrating string or an air column in a pipe, the ends are fixed. These fixed ends constrain the movement of the medium, forcing the wave to have zero displacement at these points.
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Conclusion: Therefore, a standing wave always has a node at the fixed ends of the medium in which it is formed.
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