Metal Resonance Strips
The lowest frequency at which a metal wire resonates is called the fundamental frequency of the wire and the corresponding wavelength is called the fundamental wavelength. The speed of wave propagation (v), the frequency of oscillation (f), and the wavelength (λ) are related by the equation v = λf.
A longer metal wire has a greater fundamental wavelength and thus lower frequency of oscillation, assuming a constant speed. If many metal wires of different lengths are made to oscillate, the longest wire will resonate at the lowest frequency. As the frequency of oscillation increases, the longest wire stops resonating and the middle wire begins to resonate. As the frequency of oscillation continues to increase, the middle wire stops and the shortest wire begins to resonate.