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  2. Opaque projector - Wikipedia

    en.wikipedia.org/wiki/Opaque_projector

    Opaque projectors are typically used to project images of book pages, drawings, mineral specimens, leaves, etc. They have been produced and marketed as artists' enlargement tools to allow images to be transferred to surfaces such as prepared canvas, or for lectures and discourses. Small episcope for home use

  3. Transparency (graphic) - Wikipedia

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

    an image that is not rectangular can be filled to the required rectangle using transparent surroundings; the image can even have holes (e.g. be ring-shaped) in a run of text, a special symbol for which an image is used because it is not available in the character set, can be given a transparent background, resulting in a matching background.

  4. 5 Reasons Your Snake Plant's Leaves Are Drooping ... - AOL

    www.aol.com/5-reasons-snake-plants-leaves...

    The Fix: If the leaves are falling over because of root rot or the plant is root-bound, repotting it is the best solution. "Snake plants should be repotted every three or four years," says Langelo.

  5. Acanthus (ornament) - Wikipedia

    en.wikipedia.org/wiki/Acanthus_(ornament)

    Curling acanthus-type leaves occur frequently in the borders and ornamented initial letters of illuminated manuscripts, and are commonly found in combination with palmettes in woven silk textiles. In the Renaissance classical models were followed closely, and the acanthus becomes recognisable again in large-scale architectural examples.

  6. Photographic film - Wikipedia

    en.wikipedia.org/wiki/Photographic_film

    A dark image on the negative is of higher density than a more transparent image. Most films are affected by the physics of silver grain activation (which sets a minimum amount of light required to expose a single grain) and by the statistics of random grain activation by photons. The film requires a minimum amount of light before it begins to ...

  7. Photogram - Wikipedia

    en.wikipedia.org/wiki/Photogram

    The usual result is a negative shadow image that shows variations in tone that depends upon the transparency of the objects used. Areas of the paper that have received no light appear white; those exposed for a shorter time or through transparent or semi-transparent objects appear grey, [1] while fully-exposed areas are black in the final print.

  8. Physautotype - Wikipedia

    en.wikipedia.org/wiki/Physautotype

    19th century printed reproduction of a still life believed to be a circa 1832 Niépce physautotype (glass original accidentally destroyed circa 1900) [1]. The physautotype (from French, physautotype) was a photographic process, invented in the course of his investigation of heliography, by Joseph Nicéphore Niépce and Louis Jacques Mandé Daguerre [2] in 1832, in which images were produced by ...

  9. Epidermis (botany) - Wikipedia

    en.wikipedia.org/wiki/Epidermis_(botany)

    The epidermis is the main component of the dermal tissue system of leaves (diagrammed below), and also stems, roots, flowers, fruits, and seeds; it is usually transparent (epidermal cells have fewer chloroplasts or lack them completely, except for the guard cells.) The cells of the epidermis are structurally and functionally variable.