Mechanoluminescence is light emission resulting from any mechanical action on a solid. It can be produced through ultrasound, or through other means.
- Fractoluminescence is caused by stress that results in the formation of fractures.
- PiezoluminescencePiezoluminescencePiezoluminescence is a form of luminescence created by pressure upon certain solids. This phenomenon is characterized by recombination processes involving electrons, holes and impurity ion centres Some piezoelectric crystals give off a certain amount of piezoluminescence when under pressure, as...
is caused by pressure that results only in elastic deformation.
- TriboluminescenceTriboluminescenceTriboluminescence is an optical phenomenon in which light is generated when material is pulled apart, ripped, scratched, crushed, or rubbed through the breaking of chemical bonds in the material. The phenomenon is not fully understood, but appears to be caused by the separation and reunification...
is nominally caused by rubbing, but actually because of resulting fractoluminescence, so is often used as a synonym.
- SonoluminescenceSonoluminescenceSonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.-History:The effect was first discovered at the University of Cologne in 1934 as a result of work on sonar. H. Frenzel and H. Schultes put an ultrasound transducer in a tank of...
is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.