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  2. Transparency and translucency - Wikipedia

    en.wikipedia.org/wiki/Transparency_and_translucency

    Most liquids and aqueous solutions are highly transparent. For example, water, cooking oil, rubbing alcohol, air, and natural gas are all clear. Absence of structural defects (voids, cracks, etc.) and molecular structure of most liquids are chiefly responsible for their excellent optical transmission.

  3. List of fictional elements, materials, isotopes and subatomic ...

    en.wikipedia.org/wiki/List_of_fictional_elements...

    Made primarily of the noble gas xenon, it can be used for building, engineering, and much more. It has virtually unlimited tensile strength; a wide variety of colors, including transparent and tan; and even different textures. The metal is unusual in that it is composed of a noble gas, which does not typically form strong molecular structures.

  4. Opacity - Wikipedia

    en.wikipedia.org/wiki/Opacity

    An opaque object is neither transparent (allowing all light to pass through) nor translucent (allowing some light to pass through). When light strikes an interface between two substances, in general, some may be reflected, some absorbed, some scattered, and the rest transmitted (also see refraction).

  5. Glass - Wikipedia

    en.wikipedia.org/wiki/Glass

    A glass building facade. Glass is an amorphous (non-crystalline) solid.Because it is often transparent and chemically inert, glass has found widespread practical, technological, and decorative use in window panes, tableware, and optics.

  6. Aerogel - Wikipedia

    en.wikipedia.org/wiki/Aerogel

    Nicknames include frozen smoke, [58] solid smoke, solid air, solid cloud, and blue smoke, owing to its translucent nature and the way light scatters in the material. The lowest-density silica nanofoam weighs 1,000 g/m 3 , [ 59 ] which is the evacuated version of the record-aerogel of 1,900 g/m 3 . [ 60 ]

  7. Triboluminescence - Wikipedia

    en.wikipedia.org/wiki/Triboluminescence

    These crystals were formed into a large solid cone for transport and sale. This solid sugar cone had to be broken into usable chunks using a sugar nips device. People began to notice that tiny bursts of light were visible as sugar was "nipped" in low light, an established example of triboluminescence. [6]

  8. Bubble (physics) - Wikipedia

    en.wikipedia.org/wiki/Bubble_(physics)

    When bubbles are disturbed (for example when a gas bubble is injected underwater), the wall oscillates. Although it is often visually masked by much larger deformations in shape, a component of the oscillation changes the bubble volume (i.e. it is pulsation) which, in the absence of an externally-imposed sound field, occurs at the bubble's ...

  9. State of matter - Wikipedia

    en.wikipedia.org/wiki/State_of_matter

    A vapor can exist in equilibrium with a liquid (or solid), in which case the gas pressure equals the vapor pressure of the liquid (or solid). A supercritical fluid (SCF) is a gas whose temperature and pressure are above the critical temperature and critical pressure respectively. In this state, the distinction between liquid and gas disappears.