مكعب نكير

مكعب نكر: a wire frame cube with no depth cues.

مكعب نكير Necker Cube، هوأول أشكال الخداع البصري أنشأه عالم البلورات السويسري لوي ألبير نكير على شكل معين في عام 1832. ويشاهد مكعب نكير على أنه مكعّب ثلاثي الأبعاد، ولكن المنظور الظاهري لهذا المكعب يظهر متغيرا جميع بضع ثوان.

الغموض

مكعب نكير هورسم خطوط بشكل غامض.

Necker Cube on the left, impossible cube on the right.

One possible interpretation of the Necker Cube, often claimed to be the most common interpretation^[]

Another possible interpretation

This is an example of two identical necker cubes, the one on the left showing an intermediate object going in "down from the top" while the one on the right shows the object going in "up from the bottom" which shows how the image can change its perspective simply by changing which face (front or back) appears behind the intervening object.

من الممكن إحداث النقلة بالهجريز على أجزاء مختلفة من المكعب. If one sees the first interpretation on the right it is possible to cause a switch to the second by focusing on the base of the cube until the switch occurs to the second interpretation. Similarly, if one is viewing the second interpretation, focusing on the left side of the cube may cause a switch to the first.

نظرية الفهم

المكعب المحال

Viewed from a certain angle, this cube appears to defy the laws of geometry.

Viewed from another angle, however, the non-impossibility of the shape is apparent—its cubic nature itself is an illusion.

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المصادر

^ Necker, L. A., 1832, “Observations on some remarkable optical phaenomena seen in Switzerland; and on an optical phaenomenon which occurs on viewing a figure of a crystal or geometrical solid,” London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 1, No. 5, pp. 329–337

Einhäuser, Wolfgang (2004). "Are switches in perception of the Necker cube related to eye position?". European Journal of Neuroscience. 20 (10): 2811–2818. doi:10.1111/j.1460-9568.2004.03722.x. PMID 15548224. Unknown parameter |coauthors= ignored (|author= suggested) (help)