Talk:Transparency and translucency/Archive 1
Appearance
What properties of materials makes them transparent? That depends on the structure of the electrons of the outer shells of the substance and in particular, how these electrons interact in the solid body being the material. There is a complicated theory "predicting" (calculating) absorption and its spectral dependence of different materials.
Article should also discuss Induced Transparency, Electromagnetically Induced Transparency and transparent metals (aluminium can be made transparent).