- In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at a specific preferential frequency
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Resonance facts
- Frequencies at which the response amplitude is a relative maximum are known as the system's resonant frequencies or resonance frequencies
- At resonant frequencies, small periodic driving forces have the ability to produce large amplitude oscillations
- This is because the system stores vibrational energy
- Resonance occurs when a system is able to store and easily transfer energy between two or more different storage modes (such as kinetic energy and potential energy in the case of a pendulum)
- However, there are some losses from cycle to cycle, called damping
- When damping is small, the resonant frequency is approximately equal to the natural frequency of the system, which is a frequency of unforced vibrations
- Some systems have multiple, distinct, resonant frequencies
- Resonance phenomena occur with all types of vibrations or waves: there is mechanical resonance, acoustic resonance, electromagnetic resonance, nuclear magnetic resonance (NMR), electron spin resonance (ESR) and resonance of quantum wave functions
- Resonant systems can be used to generate vibrations of a specific frequency (e
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