• Here are two NetLogo wave simulations showing resonance.

• The position of the driver is the only difference between the two simulations.

• In the top sim, resonance (energy) builds up quickly to the left of the driver.

  • The driver frequency is tuned to resonate with the wave tank length.

  • Resonance is strongly dependent on the fluid properties: friction and stiffness.

• In the bottom sim, energy also builds up quickly . But after a short time, the driver frequency interferes with the resonant frequency, decreasing the energy.

• In both sims, the wave tank to the right of the driver develops a set of resonant waves.

  • Notice that the wavelength of these resonant waves is not quite the same as the wavelength generated by the driver.

  • The wave tank resonant frequency and driver frequency are also slightly different. This is because wavelength and frequency are essentially just two ways to look at the same thing.

Here is a more complex example of resonance

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