Don’t be fooled by what you see ……

Do you think there exists any relationship between Maths and Magic?

Well  if you have read our previous blog, I am sure you will agree with me. When I was researching about this relationship I came across a mind blowing video. You must watch it. I could not believe that I was actually seeing what I was seeing.

If you think I sound crazy and disillusioned….just take a few minutes to checkout this video https://www.youtube.com/watch?v=oWfFco7K9v8 and experience it yourself.

So, what do you think it was? Magic or some kind of trickery or there is some valid explanation for it.

You guessed it right! Yes, there is a valid explanation for it. For many years now physicists, mathematicians, artists, graphic designers, architects and many others have used colours, patterns and light to create such paradoxical images that deceive our brains into seeing things that may or may not be real. These images are best known as OPTICAL ILLUSIONS.

Optical illusions can be categorised based on the nature of the difference between objects and percepts. Differences in intensive properties of targets (i.e. brightness or colour), or differences in extensive properties (their location, size, orientation or depth) can result in amazing optical illusions.

In 1854 a German high-school teacher J.J. Oppel coined the term Geometrical-Optical for all those illusions whose properties fell within the purview of geometry. Example of geometrical optical illusion based on length is Müller-Lyer illusion , on position Poggendorff illusion, on orientation Zöllner illusion and  Münsterberg illusion or shifted-chess-board illusion, straightness of lines Hering illusion, of size Delboeuf illusion and many more.

optical-illusions1

“Waterfall” by M.C. Escher a Dutch artist.

There are loads and loads of beautiful optical illusions which you can checkout on the internet.  But before I forget, for those of you who want to know the maths behind “Ambiguous cylinder Illusion” video , here’s the link to the article https://divisbyzero.com/2016/07/05/sugiharas-circlesquare-optical-illusion/.

The author is generous enough to share the template that you can print on paper to recreate the illusion yourself, so go for it.

-Aruna C., Head-Communications, BrainSTARS

Image courtesy

http://cs.brown.edu/~deus/courses/optical/Contrast4.htm

http://www.mrbartonmaths.com/opticalillusions.htm

https://en.wikipedia.org/wiki/Geometrical-optical_illusions

Further reading:

https://plus.maths.org/content/visual-curiosities-and-mathematical-paradoxes

https://en.wikipedia.org/wiki/Geometrical-optical_illusions

 

 

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