New suggestion concerning the origin of sonoluminescence (Q2492293)

For sonoluminescence (SL) (process by which light is emitted from collapsing ultrasound-driven bubbles) are suggested the basic principles that should be taken into account for a new approach to this problem, consistent with the findings of the most recent experiments in either aqueous or non-aqueous media. Unlike other models -- which place the location of light emission only inside the bubble, the authors believe that in the case of SL, light is mostly emitted by the fluid surrounding the collapsing bubble. They suggest that SL is a favorable experimental situation for studying a more general phenomenon that may occur in conditions other than bubble collapse. The emission of brief flashes of light should be observed in any material (solid, fluid, gas, or even cold plasma) providing that a tremendously high adiabatic pressure pulse could be produced. Such pressure pulses are typically obtained at shock waves generated by impacts close to or above supersonic.