PARALLAX

Parallax

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. The term is derived from the Greek παράλλαξις, meaning "alteration." Nearby objects have a larger parallax than more distant objects when observed from different positions, so parallax can be used to determine distances.

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parallax

Noun

  1. The change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer.
  2. The apparent shift of an object against a background due to a change in observer position.
  3. The angle of seeing of the astronomical unit.


The above text is a snippet from Wiktionary: parallax
and as such is available under the Creative Commons Attribution/Share-Alike License.

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