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[clipunderground]

This makes absolutely no sense. Is this some kind of joke?
I've been staring at this thing for like 5 minutes now. This is the lamest "illusion" I've ever seen. >:|

OPTIKAL ILLUZION!

 

[Archaix]

They're really the same color. Open up a paint program, cut square A(or just a piece of it) and drag it towards B. They are the exact same color.

 

[Tenguman]

^^ what he said

 

[Dilbert]

It's actually a pretty cool illusion. To really "get it," though, you will need Photoshop, or a similar program with an "eyedropper" tool.

The two squares -- marked A and B -- are seen as different by the eye. A is a "dark" square, and B is a "light" square, based on the pattern of the checkerboard. That distinction is further emphasized by the choice of text color in the square: A has light text on a dark background, and B has dark text on a light background.

However...the two squares really do have the same exact color! The "light" square is made darker by the shadow from the cylinder, and the "dark" square is made lighter by the illumination source. The easiest way to see it is to save the picture, open it in Photoshop, use the eyedropper tool to "pick up" the color from either A or B, and draw in the other square with the paintbrush. You shouldn't be able to see the line, since the two colors are identical!

 

[FoneBone]

Nah, you can basically do it in Paint.

 

[clipunderground]

damn... it really is the same! O_0

I thought something was wrong with me for a minute or two.

 

[3phemeral]

Just put your thumb in the area that separates the two squares and you'll see that they're the same.

 

[Lucky Forward]

I just printed a hardcopy and folded the page so square A was against square B, and damn if they aren't the same shade. Unfold the page and A magically becomes darker than B before your very eyes.

 

[Archaix]

I just printed a hardcopy and folded the page so square A was against square B, and damn if they aren't the same shade. Unfold the page and A magically becomes darker than B before your very eyes.

My method does essentially the same thing. The first time I saw this image, I moved the square back and forth across the screen and watched it change colors for a few minutes. Really confuse the hell out of me.

Granted, it was like 3 AM at the time.

 

[Goreomedy]

 

[jenov4]

Holy shit that was cool!

 

[Burger]

Explain this one then geniuses:

*EDIT Fixed.

 

[Ferrio]

Explain this one then geniuses:

So, where did the missing square go to in this triangle...?

Obviously somewhere at 2atoms.com

 

[Archaix]

The large shapes in those pictures aren't actually triangles. The slopes of the two triangles(red and green) are different, so the larger shape they make isn't a triangle anymore. Moving the way they are arranged doesn't change the overall area, it just moves some of the empty space to that white spot.

edit: One way to compare it is to look at each spot above the red triangle and green triangles in the first picture, and compare them directly to the same spot in the second pictures. Each of those squares have slightly less white space in them in the second image than in the first. This is the empty space that was moved to the bottom in the second image.