ঘৰ্ষণ হঘৰ্ষণক্ষয়
ঘৰ্ষণ-দীপ্তি (Assamese)
1. Triboluminescence is a phenomenon in which light is generated when a material is mechanically pulled apart, ripped, scratched, crushed, or rubbed (see tribology). The phenomenon is not fully understood... from wikipedia.org