Physical phenomena related to sonoluminescence of bubbles in liquids

Bubbles exist widely in nature.Experiments and theory show that during the collapse of a cavitation bubble the input energy density is concentrated by twelve orders of magnitude, and a flash of light on the order of picoseconds is generated. This paper describes the bubble phenomena in liquids and common methods of investigation. Bubble hydrodynamics, sonoluminescence,shock waves, laserinduced bubbles and various application prospects are presented.