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  2. Light table - Wikipedia

    en.wikipedia.org/wiki/Light_table

    Light table at Tito's bunker Draftsman using light table. A light table [1] is a viewing device that is used to review photographic film or artwork placed on top of it. A horizontal form of a self-standing lightbox, it provides even illumination of the subject from below through a translucent cover and fluorescent lights that emit little heat.

  3. Lightbox - Wikipedia

    en.wikipedia.org/wiki/Lightbox

    A variation of this is a box, with one open end, made of diffusing material, to allow the photographing of a sample object with no shadows. It is also called light tent or photo cube. [8] A folder used on stock photography to allow a user to organize digital photos. Photos can be assigned to a viewable lightbox folder by subject, for later ...

  4. Einstein's thought experiments - Wikipedia

    en.wikipedia.org/wiki/Einstein's_thought_experiments

    [6]: 348–349 Consider the illustration of Einstein's light box: [12]: 446–448 1. After emitting a photon, the loss of weight causes the box to rise in the gravitational field. 2. The observer returns the box to its original height by adding weights until the pointer points to its initial position.

  5. Camera obscura - Wikipedia

    en.wikipedia.org/wiki/Camera_obscura

    While the use of the camera obscura has waxed and waned, one can still be built using a few simple items: a box, tracing paper, tape, foil, a box cutter, a pencil, and a blanket to keep out the light. [84] Homemade camera obscura are popular primary- and secondary-school science or art projects.

  6. Key warning signs about bird flu are all going in the wrong ...

    www.aol.com/key-warning-signs-bird-flu-170000168...

    The bird flu outbreak has taken concerning turns, with more than 60 human cases confirmed. Experts outlined four signs that the virus is going in the wrong direction.

  7. Blueprint - Wikipedia

    en.wikipedia.org/wiki/Blueprint

    The tracing paper drawing is placed on top of the sensitized paper, and both are clamped under glass, in a daylight exposure frame, which is similar to a picture frame. The frame is put out into daylight, requiring a minute or two under a bright sun, or about ten minutes under an overcast sky to complete the exposure.

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