Mechanoluminescence

Mechanoluminescence is light emission resulting from any mechanical action on a solid. It can be produced through ultrasound, or through other means.
 * Electrochemiluminescence is the emission induced by an electrochemical stimulus.
 * Fractoluminescence is caused by stress that results in the formation of fractures, that in turn yield light.
 * Piezoluminescence is caused by pressure that results in elastic deformation and large polarization from the piezoelectric effect.


 * Sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.
 * Triboluminescence is nominally caused by rubbing, but sometimes occurs because of resulting fractoluminescence. It is often used as a synonym.