content_image/334882.jpg
<img src='content_image/334882.jpg'>

t/τ$_{l}$ ). The power spectrum of these oscillations is shown in Fig. 2, center. Several peaks are evident in this spectrum, corresponding to the l = 2 to 7 Rayleigh modes of the drop. Peak 1 is due to a small oscillation of the droplet’s center of mass of about L$_{0}$ (amplitude ∼ 1 mm). The frequency of this peak is independent of a . The upper panel of Fig. 2 shows the measured peak positions for different drops with radii between a = 4 . 5 mm and 14 mm; the broken lines show the Rayleigh frequency spectrum for a water drop, according to Eqn. 1. Note that the measured frequencies are slightly higher , by ∼ 1 Hz, due to the effect of the magnetogravitational potential trap. We shall calculate this frequency shift in the following 

