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  2. Face inversion effect - Wikipedia

    en.wikipedia.org/wiki/Face_inversion_effect

    Together, these regions are used to process inverted, but not upright faces. This suggests that there is something special about inverted compared to upright faces that requires them to involve object and scene processing regions. [9] There is still some activity in face recognition regions when viewing inverted faces. [12]

  3. Real image - Wikipedia

    en.wikipedia.org/wiki/Real_image

    As the object approaches the focal point the image approaches infinity, and when the object passes the focal point the image becomes virtual and is not inverted (upright image). The distance is not the same as from the object to the lenses. Real images may also be inspected by a second lens or lens system.

  4. Inverted microscope - Wikipedia

    en.wikipedia.org/wiki/Inverted_microscope

    An inverted microscope is a microscope with its light source and condenser on the top, above the stage pointing down, while the objectives and turret are below the stage pointing up. It was invented in 1850 by J. Lawrence Smith , a faculty member of Tulane University (then named the Medical College of Louisiana).

  5. Thatcher effect - Wikipedia

    en.wikipedia.org/wiki/Thatcher_effect

    When these images are rotated, however, it becomes clear that the face on the right had its eyes and mouth inverted. The Thatcher effect or Thatcher illusion is a phenomenon where it becomes more difficult to detect local feature changes in an upside-down face, despite identical changes being obvious in an upright face.

  6. Pentagram - Wikipedia

    en.wikipedia.org/wiki/Pentagram

    The Church of Jesus Christ of Latter-day Saints is theorized to have begun using both upright and inverted five-pointed stars in Temple architecture, dating from the Nauvoo Illinois Temple dedicated on 30 April 1846. [32] Other temples decorated with five-pointed stars in both orientations include the Salt Lake Temple and the Logan Utah Temple.

  7. Inverted pendulum - Wikipedia

    en.wikipedia.org/wiki/Inverted_pendulum

    An inverted pendulum is a pendulum that has its center of mass above its pivot point. It is unstable and falls over without additional help. It can be suspended stably in this inverted position by using a control system to monitor the angle of the pole and move the pivot point horizontally back under the center of mass when it starts to fall ...

  8. Curved mirror - Wikipedia

    en.wikipedia.org/wiki/Curved_mirror

    Upright; Magnified (larger) = (Object at focal point) Reflected rays are parallel and never meet, so no image is formed. In the limit where S approaches F, the image distance approaches infinity, and the image can be either real or virtual and either upright or inverted depending on whether S approaches F from its left or right side.

  9. Erect image - Wikipedia

    en.wikipedia.org/wiki/Erect_image

    In an erect image, directions are the same as those in the object, in contrast to an inverted image. It is one of the properties of images formed in a plane mirror . Some telescopes and other devices such as the camera obscura present an inverted image on the viewing surface.