X-Nico

unusual facts about resonant frequency



Drill string

When the vibrator tunes to the resonant frequency of the system, the reactive load impedance cancels out to zero by virtue of the inductance reactance (mass of the system) equalling the compliance or stiffness reactance (elasticity of the tubular).

Rubber ducky antenna

Electrically short antennas have considerable capacitive reactance, so to make them resonant at the operating frequency an inductor (loading coil) is added in series with the antenna.


see also

Aperture grille

The vertical wires of the aperture grille have a resonant frequency and will vibrate in sympathetic resonance with loud sounds near the display, resulting in fluttering and shimmering of colors on the display.

Detuning

Laser detuning, the difference between a laser frequency and a resonant frequency.

Plasmonic nanoparticles

Within that range, quantitative information on the EGFR density in the cell membrane can be retrieved based on the shift in resonant frequency of the plasmonic particles.