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  2. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    Any kind of grid that deceives a person's vision. The two most common types of grid illusions are the Hermann grid illusion (1870) and the scintillating grid illusion (1994). The first is characterized by "ghostlike" grey blobs perceived at the intersections of a white (or light-colored) grid on a black background.

  3. Yehudi lights - Wikipedia

    en.wikipedia.org/wiki/Yehudi_lights

    Yehudi Lights flight path in crosswind to keep 3 degree wide cones of light from nose pointing straight at the enemy. Pilots noted that if they chose a straight-line heading to compensate for a crosswind, the nose of the plane would not point directly at the enemy, but could be, say, 20 degrees off. Since making the beams bright enough at such ...

  4. List of types of lighting - Wikipedia

    en.wikipedia.org/wiki/List_of_types_of_lighting

    Lighting is the deliberate use of light to achieve a practical or aesthetic effect.. Types of lighting include: Christmas lighting; Automotive lighting. Emergency vehicle lighting

  5. Cloaking device - Wikipedia

    en.wikipedia.org/wiki/Cloaking_device

    With the cloaking device active, light is 'deflected' around the object to make it appear as if it did not exist, rendering it invisible. A cloaking device is a hypothetical or fictional stealth technology that can cause objects, such as spaceships or individuals, to be partially or wholly invisible to parts of the electromagnetic (EM) spectrum .

  6. Safelight - Wikipedia

    en.wikipedia.org/wiki/Safelight

    An amber (light brown) safelight for use with certain black-and-white photographic papers A safelight is a light source suitable for use in a photographic darkroom . It provides illumination only from parts of the visible spectrum to which the photographic material in use is nearly, or completely insensitive.

  7. Category:Types of lamp - Wikipedia

    en.wikipedia.org/wiki/Category:Types_of_lamp

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