Radius measurement of a sonoluminescing gas bubble

Accurate measurement of the radius of a sonoluminescing gas bubble by a lig ht scattering method was suggested. This can be achieved because of the rem arkable stability of a sonoluminescing gas bubble, which has the same shape variation sequence in every oscillation cycle with only 50 ps jitter in th e time between Rashes, which enables sequential measurement of the bubble r adius by the light scattering method and direct imaging technique for the f irst time. The measured light scattering data with an appropriate proportio nality index value can be well fitted to the direct observation for the bub ble radius-time curve. However, the observed value of the proportionality i ndex is different from the one predicted by the Mie scattering theory.