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Why does this arrow always point to the right?


Posted on Monday, 7 May, 2018 | Comment icon 12 comments

The illusion has left many people stumped. Image Credit: Kokichi Sugihara / Instagram / physicsfun
This fascinating optical illusion by mathematician Kokichi Sugihara has left Internet users scratching their heads.
Hailed for his mind-bending optical illusion inventions, Sugihara, who hails from Meiji University in Japan, has once again managed to stump the Internet - this time with a three-dimensional arrow.

The peculiar object, which looks totally symmetrical from above, somehow manages to always point towards the right no matter which way round it is placed.

Even when a mirror is positioned behind it, the illusion still seems to work just the same.

The answer, it turns out, is that the object has been subtly designed to change its appearance depending on the angle at which you look at it.

The undulations on the top have been created in such a way so as to make one side appear to have more of a point than the other.

It is a remarkable example of Sugihara's skill as a mathematician and illusionist.


Source: Gizmodo | Comments (12)

Tags: Optical Illusion

Recent comments on this story
Comment icon #3 Posted by acute on 6 May, 2018, 14:45
That guy is a genius! http://thekidshouldseethis.com/post/ambiguous-cylinder-illusion-by-kokichi-sugihara
Comment icon #4 Posted by LV-426 on 6 May, 2018, 15:37
WITCHCRAFT!!! *lights a torch and marches through the village*
Comment icon #5 Posted by seanjo on 7 May, 2018, 10:55
Bumps and shadows...not unlike the adverts you see on football pitches.
Comment icon #6 Posted by Jon the frog on 7 May, 2018, 11:40
Wow, lol, that's so awesome !
Comment icon #7 Posted by Seti42 on 7 May, 2018, 22:27
That is impressive, but it's more impressive on video than IRL. Like most of these types of illusions, they only work at a specific viewing angle. Hence the stationary camera. Move the camera/viewer angle a few degrees in any direction, the illusion is ruined.
Comment icon #8 Posted by qxcontinuum on 8 May, 2018, 3:26
Ok I don't see an arrow but an oval. How can it be an arrow?
Comment icon #9 Posted by pallidin on 8 May, 2018, 19:52
Outstanding!! Now, burn him at the stake...
Comment icon #10 Posted by freetoroam on 8 May, 2018, 20:03
I scrolled down too. Very clever illusion...but once you know, games over. 
Comment icon #11 Posted by pallidin on 8 May, 2018, 20:44
Can he make my Ford look like a Ferrari when viewed at certain angles?! Imagine a house built specifically for angle illusions.
Comment icon #12 Posted by acute on 9 May, 2018, 11:45
BURN HIM!


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