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Dichroic - In optics, the term dichroic has two related but distinct meanings. A dichroic material is one which either causes light to be split up into distinct beams of different wavelengths (colours), or, one . Used . in which light rays having different polarizations are absorbed by different amounts.

The original meaning of dichroic (from the Greek dikhroos, two-coloured) refers to any optic. Used . al device which can split a beam of light into two beams with differing wavelengths. Such devices include mirrors and filters, usually treated with optical coatings, which are designed to reflect light over a ...

Arc Lamp - An arc lamp is a device that produces light by the sparking (or arcing, from voltaic arc or electric arc) of a high current between two carbon rod electrodes. The rods are touched and then slowly draw. Used . n apart; as the rods separate the current is "struck" and arcs across the gap in a bright, ionized path. The arc produces a temperature of several thousand degrees, and the tips of the carbon. Used . rods are heated to incandescence, creating light. The rods are slowly vaporized during the process and need to be regularly adjusted to maintain the arc. The concept was first demonstrated by Sir Humphry Davy...

Scaffolding - Scaffolding is a temporary platform or framework, either supported from below or suspended, that is used to support people and material during the set up and deconstruction of a stage or venue.
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Stairs - Stairs are used to access the stage and raised parts of the stage. They are usually collapsable for the purposes of storage and transportation. . Used . . Used . ...

Subs - A sub or subwoofer is a speaker dedicated to the reproduction of bass frequencies, usually from about 20 Hz to about 200 Hz. . Used . . Used . ...