Pushing a person in a swing
is a common example of resonance. The loaded swing, a pendulum
, has a natural frequency of oscillation, its resonant frequency, and resists being pushed at a faster or slower rate.
coefficients.]]In physics, resonance is the tendency of a system to vibrate with increasing amplitudes at some frequencies of excitation. These are known as the system's resonant frequencies (or resonance frequencies). The resonator may have a fundamental frequency and any number of harmonics.
An example of useful effect of resonant frequency is a guitar string which makes a characteristic noise when it is touched. The noise depends on how thick or slack the string is.
In earthquake engineering, on contrary, any possibility of a resonance is detrimental for the building structure.
The Kirkwood gap and other connections among orbits are caused by orbital resonance.