Chladni's law - Wikipedia
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Chladni's law - Wikipedia
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Hooke ran a bow along the edge of a glass plate covered with flour, and saw the nodal patterns emerge. The powder moves due to the vibration and accumulates progressively in points of the surface corresponding to the sound vibration. The points form a pattern of lines, known as... See more
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when two or more frequencies are vibrating in phase, coherence, nested or in harmonious mathematical ratios with each other, they are referred to as having resonance, which is really an expression of coherence.