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A standing wave is the result of the interference of 2 opposing waves right? Then how can this diagram on the upper left be true?harmonics of standing waves

One sound wave is created by the musician, the other is supposed to come as a reflection, how?

And if the second, opposing wave is somehow generated by reflection, shouldn't the point where it was created be a node, not an anti node?

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marked as duplicate by John Rennie, ZeroTheHero, Yashas, David Hammen, Kyle Kanos Mar 25 '17 at 17:44

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