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Why does this arrow always point to the right?

By T.K. Randall
May 7, 2018 · Comment icon 11 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 (11)




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Recent comments on this story
Comment icon #2 Posted by DebDandelion 6 years ago
Wow...wow...and awesome...
Comment icon #3 Posted by acute 6 years ago
That guy is a genius! http://thekidshouldseethis.com/post/ambiguous-cylinder-illusion-by-kokichi-sugihara
Comment icon #4 Posted by LV-426 6 years ago
WITCHCRAFT!!! *lights a torch and marches through the village*
Comment icon #5 Posted by Jon the frog 6 years ago
Wow, lol, that's so awesome !
Comment icon #6 Posted by Seti42 6 years ago
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 #7 Posted by qxcontinuum 6 years ago
Ok I don't see an arrow but an oval. How can it be an arrow?
Comment icon #8 Posted by pallidin 6 years ago
Outstanding!! Now, burn him at the stake...
Comment icon #9 Posted by freetoroam 6 years ago
I scrolled down too. Very clever illusion...but once you know, games over. 
Comment icon #10 Posted by pallidin 6 years ago
Can he make my Ford look like a Ferrari when viewed at certain angles?! Imagine a house built specifically for angle illusions.
Comment icon #11 Posted by acute 6 years ago
BURN HIM!


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