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  2. Transparency (projection) - Wikipedia

    en.wikipedia.org/wiki/Transparency_(projection)

    Transparency (projection) Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.

  3. Reversal film - Wikipedia

    en.wikipedia.org/wiki/Reversal_film

    A single slide, showing a color transparency in a plastic frame. Slide projector, showing the lens and a typical double slide carrier. In photography, reversal film or slide film is a type of photographic film that produces a positive image on a transparent base. [1] Instead of negatives and prints, reversal film is processed to produce ...

  4. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    Overhead projector. An overhead projector (often abbreviated to OHP), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience. In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also ...

  5. Google Slides - Wikipedia

    en.wikipedia.org/wiki/Google_Slides

    google.com /slides. Google Slides is a presentation program and part of the free, web-based Google Docs suite offered by Google. Google Slides is available as a web application, mobile app for: Android, iOS, and as a desktop application on Google's ChromeOS. The app is compatible with Microsoft PowerPoint file formats. [5]

  6. Opaque projector - Wikipedia

    en.wikipedia.org/wiki/Opaque_projector

    Opaque projector. An episcope which was used in a University of Cambridge lecture hall in the late 1800s. The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope, which is a projector used for projecting images of ...

  7. Transparency (graphic) - Wikipedia

    en.wikipedia.org/wiki/Transparency_(graphic)

    Transparency (graphic) GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.

  8. Negative (photography) - Wikipedia

    en.wikipedia.org/wiki/Negative_(photography)

    In photography, a negative is an image, usually on a strip or sheet of transparent plastic film, in which the lightest areas of the photographed subject appear darkest and the darkest areas appear lightest. [1] This reversed order occurs because the extremely light-sensitive chemicals a camera film must use to capture an image quickly enough ...

  9. Vectograph - Wikipedia

    en.wikipedia.org/wiki/Vectograph

    A vectograph is a type of stereoscopic print or transparency viewed by using the polarized 3D glasses most commonly associated with projected 3D motion pictures. Credit for the concept of the vectograph is due to Joseph Mahler, cousin of composer and conductor Gustav Mahler. He immigrated to the US from Czechoslovakia in 1938 and was hired by ...

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