# Topic:optical illusions

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## Professor Kokichi Sugihara creates his mind-blowing illusions with math

Professor Kokichi Sugihara is world-renowned for his award-winning impossible objects and reality-defying illusions. He uses mathematics to make the three-dimensional objects that create his impossible scenes and illu...

## “Balloons look really weird when they resonate.” – Steve Mould

What is the resonant frequency of a balloon? Steve Mould hooked up a balloon to a scientific vibration generator to find out. Resonating balloons look really odd on camera. What you see is a sort of slow motion. ...

## The footstep illusion & more optical tricks from Akiyoshi Kitaoka

Professor Akiyoshi Kitaoka studies and makes visual illusions in the psychology department at Kyoto's Ritsumeikan University. In the illusion above, via Twitter, he demonstrates the footstep illusion. It's explained o...

## The Hidden Chairs

Which way is the chair facing? Watch the Dezeen video above and see if you've guessed correctly. The black lacquered plywood chair, one of three designed by French design studio Ibride, references furniture design fro...

## How to draw a floating / levitating cube

Amaze friends and family with your version of this anamorphic optical illusion: a floating/levitating cube. Though it may take some practice to get the proportions and shading right, this 3D quick trick tutorial by ar...

## How to make a Hollow Mask Illusion

How do we perceive faces? With some balloons, newspaper, some paste for paper mâché, and paints, you can create a hollow mask that appears to follow you as you move back and forth around the room. Rachel and her child...

## You Can’t See This (Mind Tricks)

Our brains and eyes aren't always showing us everything that's available to see. Instead, learning, memory, and expectation changes our vision to fit as much as we can comprehend in any given moment. In this AsapScien...

## Pattern distortions seen through a glass of water

Try this classic trick at home with different shaped glasses (which shapes the water within them) and a few patterned backgrounds. As you look through the glass, you'll see the background pattern shift. Why? As the li...

## Ambiguous Cylinder Illusion by Kokichi Sugihara

Second place winner of the Best Illusion of the Year Contest 2016, this is the Ambiguous Cylinder Illusion by mathematics professor Kokichi Sugihara of Meiji University in Tokyo, Japan. The direct views of the obj...

## Yosemite’s Horsetail ‘firefall’ at sunset

Filmed on February 15th, 2016, a brilliant sunset illuminates the white mist and spray of Yosemite National Park's Horsetail Fall with bright oranges and reds. Called a 'firefall', the name for this optical illusion "...

## Quirkology’s 10 Amazing Optical Illusions (and how to make them)

From former magician/current author and British psychologist Richard Wiseman, enjoy these 10 amazing DIY optical illusions that you can try at home: A LEGO impossible object, a kiwi triangle, an appearing straw, an up...

## Contact juggling with street music

Watch this young Switzerland-based performer and contact juggler in an impromptu sidewalk performance with an upright bassist and an accordionist. This kind of contact juggling is a style of object manipulation that m...

## Three quirky sleight of hand illusions by Richard Wiseman

From former magician/current author and British psychologist Richard Wiseman, watch Assumptions, a 2012 short promotional video from his psychology-based Quirkology YouTube channel. Below, enjoy The Tube of Mystery an...

## The Mephisto Spiral – Part magic trick, part optical illusion

Watch as Grand Illusions' Hendrik Ball deftly showcases The Mephisto Spiral, a brain-breaking toy that seems to mix an optical illusion with a bit of the slight-of-hand skills required for magic tricks: It looks li...

## Kokichi Sugihara’s Impossible Rooftop & Folding Ladder Illusions

File under impossible objects, this is the Impossible Rooftop Illusion or "Anti-Gravity Two Sided Roof" by Meiji University's Professor Kokichi Sugihara in 2013. Using computer software, Sugihara creates award-winning...

## CYMATICS: Science + music = audio frequency visualizations

With help from a Chladni Plate, vibrating liquid on a speaker dish, a hose pipe optical trick, ferrofluid, a Ruben's Tube, and a Telsa Coil, New Zealand musician Nigel Stanford showcases audio frequency visualizations...

## The Crazy Circle Illusion – How are these dots moving?

In this Brusspup mind-bender, you may think you see a circle of eight white dots rotating around the inside of a larger red circle, but you're actually witnessing something else, and you may not believe it unless you ...

## Bernard Pras’ anamorphic portrait of Ferdinand Cheval

At the at Palais Idéal du Facteur Cheval, in Hauterives, France, there's a piece by French painter, photographer and sculptor Bernard Pras that transforms seemingly broken objects into a portrait of French postman and...

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