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  2. Line art - Wikipedia

    en.wikipedia.org/wiki/Line_art

    Line art or line drawing is any image that consists of distinct straight lines or curved lines placed against a background (usually plain). Two-dimensional or three-dimensional objects are often represented through shade (darkness) or hue . Line art can use lines of different colors, although line art is usually monochromatic.

  3. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Vertical-horizontal illusion is the tendency for observers to overestimate the length of a vertical line relative to a horizontal line of the same length. Vista paradox: Visual tilt effects: Wagon-wheel effect: White's illusion: Wundt illusion: The two red vertical lines are both straight, but they may look as if they are bowed inwards to ...

  4. Straight flag - Wikipedia

    en.wikipedia.org/wiki/Straight_flag

    A flag composed of alternating black and white strips, with a design similar to the rainbow LGBTQ pride flag, was created to represent straight pride. [1] Several variations of this flag exist. One uses white, grey and black colors, mimicking the rainbow flag and originating in the early 2000s.

  5. Café wall illusion - Wikipedia

    en.wikipedia.org/wiki/Café_wall_illusion

    The café wall illusion (also known as the Münsterberg illusion or the kindergarten illusion) is a geometrical-optical illusion in which the parallel straight dividing lines between staggered rows with alternating dark and light rectangles (such as bricks or tiles) appear to be sloped, not parallel as they really are.

  6. Road surface marking - Wikipedia

    en.wikipedia.org/wiki/Road_surface_marking

    A broken white line in the direction of travel, where the gaps are longer than the painted lines, indicates the center of the road and that there are no hazards specific to the design and layout of the road, i.e. no turnings, sharp bends ahead etc. A broken white line in which the gaps are shorter than the painted lines indicates an upcoming ...

  7. Thin blue line - Wikipedia

    en.wikipedia.org/wiki/Thin_blue_line

    The "Thin Blue Line" flag is all black, bearing a single horizontal blue stripe across its center. Variations of the flag, often using various national flags rendered in black and white with a blue line through the center, are seen below.

  8. AOL

    search.aol.com

    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

  9. Grid illusion - Wikipedia

    en.wikipedia.org/wiki/Grid_illusion

    It is constructed by superimposing white discs on the intersections of orthogonal gray bars on a black background. Dark dots seem to appear and disappear rapidly at random intersections, hence the label "scintillating". When a person keeps their eyes directly on a single intersection, the dark dot does not appear.