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However, the single-crystal copper not only became a better conductor than high purity polycrystalline silver, but with prescribed heat and pressure treatment could surpass even single-crystal silver. Although impurities are usually bad for conductivity, a silver single crystal with a small amount of copper substitutions proved to be the best.
Crystal optics is the branch of optics that describes the behaviour of light in anisotropic media, that is, media (such as crystals) in which light behaves differently depending on which direction the light is propagating. The index of refraction depends on both composition and crystal structure and can be calculated using the Gladstone–Dale ...
In 2000, Chihuly's commission from the Victoria and Albert Museum for a 30-foot-high (9.1 m), blown-glass chandelier dominates the museum's main entrance. Chihuly's The Sun was on temporary display until January 2006 at Kew Gardens, London, England.
The quarter wave or half wave voltage requirements increase with crystal aperture size, but the requirements can be reduced by lengthening the crystal. Two or more crystal can be incorporated into a transverse Pockels cell. One reason is to reduce the voltage requirement by extending the overall length of the Pockels cell.
The mobile axis of a liquid crystal is called a director. It is the space and time average of the orientation of the long molecular axis within a small volume element of material demonstrating a mesophase. Electrical manipulation of the director enables liquid-crystal displays.
Hardstone carving, in art history and archaeology, is the artistic carving of semi-precious stones (and sometimes gemstones), such as jade, rock crystal (clear quartz), agate, onyx, jasper, serpentinite, or carnelian, and for objects made in this way. [1] [2] Normally the objects are small, and the category overlaps with both jewellery and ...