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2. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   It is a transparent thermoplastic, used as an engineering plastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Hesalite, Plexiglas, Acrylite, Lucite, and Perspex, among several others . This plastic is often used in sheet form as a lightweight or shatter-resistant alternative to glass. It can ...

3. Transparency and translucency - Wikipedia

   en.wikipedia.org/wiki/Transparency_and_translucency

   Color centers (or dye molecules, or "dopants") in a dielectric absorb a portion of the incoming light. The remaining frequencies (or wavelengths) are free to be reflected or transmitted. This is how colored glass is produced. Most liquids and aqueous solutions are highly transparent.

4. Transparent ceramics - Wikipedia

   en.wikipedia.org/wiki/Transparent_ceramics

   Transparent armor is a material or system of materials designed to be optically transparent, yet protect from fragmentation or ballistic impacts. The primary requirement for a transparent armor system is to not only defeat the designated threat but also provide a multi-hit capability with minimized distortion of surrounding areas.

5. Color gel - Wikipedia

   en.wikipedia.org/wiki/Color_gel

   Many color gels organized, some in gel heads. A color gel or color filter (Commonwealth spelling: colour gel or colour filter), also known as lighting gel or simply gel, is a transparent colored material that is used in theater, event production, photography, videography and cinematography to color light and for color correction. [1]

6. Acrylic - Wikipedia

   en.wikipedia.org/wiki/Acrylic

   Acrylic resin, a group of related thermoplastic or thermosetting plastic substances; Acrylic fiber, a synthetic fiber of polyacrylonitrile; Acrylic paint, fast-drying paint containing pigment suspension in acrylic polymer emulsion; Poly(methyl methacrylate), also known as acrylic glass or Plexiglass, a transparent thermoplastic

7. List of refractive indices - Wikipedia

   en.wikipedia.org/wiki/List_of_refractive_indices

   Refraction at interface. Many materials have a well-characterized refractive index, but these indices often depend strongly upon the frequency of light, causing optical dispersion.