Beat Frequency

Autor:mbetzen

This shows the interference between two waves (red and blue) of slightly different wavelength. This produces a wave with a changing amplitude beat (purple). The frequency of the amplitude change is the beat frequency.

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函數的單調性
Prism Drawn in 2-Point Perspective
函數的奇偶性
Neuberg's Theorem
random coprime pairs

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เรือแล่นในทะเล
derivative as slope of tangent

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Kosinus
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