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Doubochinski's pendulum
Experiment
Experiment
Doubochinski's pendulum is a classical oscillator interacting with a high-frequency field in such a way that the oscillator takes on a discrete set of stable regimes of oscillation, each at a frequency near to the proper frequency of the oscillator, but each with a distinct, "quantized" amplitude. |display-authors=etal
A simple demonstration apparatus consists of a mechanical pendulum interacting with a magnetic field.
The mechanical pendulum arm and solenoid are configured in such a way, that the pendulum arm interacts with the oscillating magnetic field of the solenoid only over a limited portion of its trajectory – the so-called "zone of interaction" – outside of which the strength of the magnetic field drops off rapidly to zero. This spatial inhomogeneity of the interaction is key to the discretized oscillation amplitudes and other unusual properties of the system.
References
References
- (2020). "Subharmonic frequency response in a magnetic pendulum". American Journal of Physics.
- (10 February 2021). "Investigation of argumental oscillations of a physical pendulum". European Journal of Physics.
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