Colours perceived by our eyes are only our partial perception of MUCH more complex reality : complex vibration of light (and other vibrations as well).

Colors perceived by our eyes are only our partial perception of MUCH more complex reality : complex vibration of light (and other vibrations as well).

Resonant systems can be used to generate vibrations at a specific frequency, or to select specific components from a complex vibration containing many frequencies.

Resonant systems can be used to generate vibrations of a specific frequency, or pick out specific frequencies from a complex vibration containing many frequencies.