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  2. Oxford Electric Bell - Wikipedia

    en.wikipedia.org/wiki/Oxford_Electric_Bell

    The experiment consists of two brass bells, each positioned beneath a dry pile (a form of battery), the pair of piles connected in series, giving the bells opposite electric charges. The clapper is a metal sphere approximately 4 mm (3 ⁄ 16 in) in diameter suspended between the piles, which rings the bells alternately due to electrostatic ...

  3. Kinetoscope - Wikipedia

    en.wikipedia.org/wiki/Kinetoscope

    The Kinetoscope was not a movie projector, but it introduced the basic approach that would become the standard for all cinematic projection before the advent of video: it created the illusion of movement by conveying a strip of perforated film bearing sequential images over a light source with a high-speed shutter.

  4. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

  5. The Dickson Experimental Sound Film - Wikipedia

    en.wikipedia.org/wiki/The_Dickson_Experimental...

    The film features Dickson playing a violin into a recording horn for an off-camera wax cylinder. [3] The melody is from a barcarolle, "Song of the Cabin Boy", from Les Cloches de Corneville (literally The Bells of Corneville; presented in English-speaking countries as The Chimes of Normandy), a light opera composed by Robert Planquette in 1877. [4]

  6. Lighting - Wikipedia

    en.wikipedia.org/wiki/Lighting

    In some instances, the materials used on walls and furniture play a key role in the lighting effect. For example, dark paint tends to absorb light, making the room appear smaller and more dim than it is, whereas light paint does the opposite. Other reflective surfaces also have an effect on lighting design. [13] [30]

  7. Sound stage - Wikipedia

    en.wikipedia.org/wiki/Sound_stage

    An empty sound stage with infinity cyclorama and an overhead light grid.. A sound stage (also written soundstage) is a large, soundproof structure, building or room with large doors and high ceilings, used for the production of theatrical film-making and television productions, usually located on a secured movie or television studio property.