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  2. Psychedelic art - Wikipedia

    en.wikipedia.org/wiki/Psychedelic_art

    A liquid oil projection. Psychedelic visual art is a broad, widely-represented term, though it is commonly identifiable by its use of one or more of the listed subject matters:

  3. Checker shadow illusion - Wikipedia

    en.wikipedia.org/wiki/Checker_shadow_illusion

    The image depicts a checkerboard with light and dark squares, partly shadowed by another object. The optical illusion is that the area labeled A appears to be a darker color than the area labeled B.

  4. Ponzo illusion - Wikipedia

    en.wikipedia.org/wiki/Ponzo_illusion

    An example of the Ponzo illusion. Both of the horizontal yellow lines are the same length. The Ponzo illusion is a geometrical-optical illusion that takes its name from the Italian psychologist Mario Ponzo (1882–1960).

  5. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    A familiar phenomenon and example for a physical visual illusion is when mountains appear to be much nearer in clear weather with low humidity than they are.This is because haze is a cue for depth perception, [7] signalling the distance of far-away objects (Aerial perspective).

  6. Ebbinghaus illusion - Wikipedia

    en.wikipedia.org/wiki/Ebbinghaus_illusion

    The two orange circles are exactly the same size; however, the one on the right appears larger. The Ebbinghaus illusion or Titchener circles is an optical illusion of relative size perception.

  7. Illusion - Wikipedia

    en.wikipedia.org/wiki/Illusion

    An illusion is a distortion of the senses, which can reveal how the mind normally organizes and interprets sensory stimulation.Although illusions distort the human perception of reality, they are generally shared by most people.

  8. Auditory illusion - Wikipedia

    en.wikipedia.org/wiki/Auditory_illusion

    Auditory illusions are illusions of real sound or outside stimulus. [1] These false perceptions are the equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or sounds that should not be possible given the circumstance on how they were created.

  9. Café wall illusion - Wikipedia

    en.wikipedia.org/wiki/Café_wall_illusion

    The café wall illusion. The horizontal lines are parallel, despite appearing to be at different angles to each other. The same image, with colors of lower contrast, no longer displaying the illusion