Editing Triboluminescence (section)

====Deformation induced EMR====
The study of deformation is essential for the development of new materials. Deformation in metals depends on temperature, type of stress applied, strain rate, oxidation, and corrosion. Deformation-induced EMR can be divided into three categories: effects in ionic crystal materials, effects in rocks and granites, and effects in metals and alloys. EMR emission depends on the orientation of the grains in individual crystals since material properties are different in differing directions.<ref>{{citation | journal=Journal of Zhejiang University Science A| pages=1800–1809| first=Rajeev | last=KUMAR  | year=2006  | title=Effect of processing parameters on the electromagnetic radiation emission during plastic deformation and crack propagation in copper-zinc alloys|volume=7|issue=1 | doi=10.1631/jzus.2006.a1800| bibcode=2006JZUSA...7.1800K| s2cid=122149160}}</ref> Amplitude of the EMR pulse increases as long as the crack grows as new atomic bonds are broken, leading to EMR. The pulse starts to decay as the cracking halts.<ref>{{cite journal |last1=Frid |first1=V |last2=Rabinovitch |first2=A |last3=Bahat |first3=D |title=Fracture induced electromagnetic radiation |journal=Journal of Physics D: Applied Physics |date=7 July 2003 |volume=36 |issue=13 |pages=1620–1628 |doi=10.1088/0022-3727/36/13/330 |bibcode=2003JPhD...36.1620F |s2cid=250758753 }}</ref> Observations from experiments showed that emitted EMR signals contain mixed frequency components.