Sonoluminescence is the emission of light by bubbles in a liquid excited by sound.
Four steps are presented :
1. apparition of bubble 2. quick expansion 3. sudden contraction (very short compared to expansion) 4. light produced by the high pressure and high temperatures inside the small bubble
This file is licensed under the Creative CommonsAttribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Official license