Intro to parallax (article) | Khan Academy
https://www.khanacademy.org/science/in-in-class11th-physics/in-in-11th-physics-units-and-measurement/in-in-11th-physics-physical-quantities-and-their-measurement/a/intro-to-parallax
webParallax is this apparent shift caused by viewing an object from two different vantage points. Next, gradually pull your hand away from your face while still alternately opening and closing your right and left eye. Does the gap between the two images change? Yes: the greater the distance, the smaller the gap.
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