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- deviation of a physical system from being a harmonic oscillator (en)
- انحراف یک سامانه فیزیکی از داشتن یک نوسانسازی هماهنگ (fa)
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- A pendulum swings back and forth. (en)
- A block on a spring oscillates horizontally, compressing and stretching. (en)
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- A pendulum is a simple anharmonic oscillator. Depending on the mass's angular position , a restoring force pushes coordinate back towards the middle. This oscillator is anharmonic because the restoring force is not proportional to , but to . Because the linear function approximates the nonlinear function when is small, the system can be modeled as a harmonic oscillator for small oscillations. (en)
- The "block-on-a-spring" is a classic example of harmonic oscillation. Depending on the block's location, , it will experience a restoring force toward the middle. The restoring force is proportional to , so the system exhibits simple harmonic motion. (en)
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- Harmonic vs. Anharmonic Oscillators (en)
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- Easy_harmonic_oscillator.gif (en)
- Oscillating_pendulum.gif (en)
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- This paragraph is short and vague. Would someone who understands it please redo the coverage of parametric coupling? (en)
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- Anharmonicity (en)
- Anharmònic (ca)
- Anharmonischer Oszillator (de)
- Anharmonicité (fr)
- Anarmonicità (it)
- 非調和性 (ja)
- Oscylator anharmoniczny (pl)
- Anarmonicidade (pt)
- Ангармонічні коливання (uk)
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