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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...

Reverb - Reverb is an audio effect that reproduces the many echos that occur when a sound is produced in an enclosed space where the sound is reflected repeatedly by the boundaries of the enclosure, even after. Used . the source of the sound stops. The number of echos and the duration of the echos can be varied and with some modern effects units, the shape of the enclosure can be altered as well.. Used . ...

Platforms - Some stages are made up of many smaller table like platforms so they can be easily transported or stored. These platforms are generally used in the forming of large stages, are fastened together, com. Used . e in different hights and widths and have different materials for their surface, like woods and canvases. . Used . ...

Crank Lifts - A crank lift is used to manually lift and set a section of scaffolding into place.. Used . . Used . ...

Zoom Lens - A mechanical assembly of lens elements with the capability to vary its focal length allowing for a closer or farther view of a subject, without changing perspective. Zoom lenses are often described b. Used . y the ratio of their focal lengths from longest to shortest. A 100mm to 400mm zoom may be described as a 4:1 or 4× zoom.

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