Compare the process of light emission in (a) incandescence and fluorescence (b) triboluminescence and phosphorescence

$\textit{a.}$, In the process of incandescence light is produced when there is a heating up of metal through the electric current.

Metal, which is heated up, will emit light.

In the process of fluorescence, materials absorbs ultraviolet light and emit white light after.

$\textit{b.}$, In the process of tribolumiscence when it comes to rubbing, scratching or crushing crystals, life is being emitted.

In the process of phosphorence light is emitted after the ultraviolet light is absorbed.

a. Light in incandescence is produced by heating up a metal through electric current. The hot metal emits light. In fluorescence however, light is emitted by florescent materials which emit white light after absorbing ultraviolet light.