standing_wave

Sonoluminescence

from http://www-phys.llnl.gov/N_Div/sonolum/

Sonoluminescence: an Introduction

About the LLNL sonoluminescence experiment

What is sonoluminescence?

Sonoluminescence is the emission of light by bubbles in a liquid excited by sound. It was first discovered by scientists at the University of Cologne in 1934, but was not considered very interesting at the time.[1]

In recent years, a number of researchers have sought to understand this phenomenon in more detail. A major breakthrough occurred when Gaitan et al. were able to produce single-bubble sonoluminescence, in which a single bubble, trapped in a standing acoustic wave, emits light with each pulsation.[2] Before this development, research was hampered by the instability and short lifetime of the phenomenon.

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