Optical Illusions

[Tomi]

I was just randomly searching my computer, and I found some old optical illusion type things.  They're kinda cool, and they make me try to think of why these things look like they do.  Do you have any cool looking optical illusions?

[Tomi]

or this?

[Tomi]

and this?  (BTW, is this considered triple posting even for posting multiple pictures?)

[Kijuki_Magazaki]

There was a topic about this a looooooooooooong time ago. But since I don't know where it is I won't lock. And I know a really cool one... but I need to find it..

EDIT: Found it.



Which square is darker? Square A? Or b? Or... are they just the same?

[Ace of Spades]

Actually, KM. The question is supposed to be, which letter is darker. A or B? And the answer is, (taken out because we know giving away the answer is cool, right?).

[artoni]

Does this count?

[Ace of Spades]

This one's cool. Stare at this image for about 30 seconds, (more if you want a bigger effect). When you're done staring, immediately look at a a white object (like a piece of paper or something. Have it with you before you look at this so you can do it immediately) What do you see?

[MrMister]

Originally posted by Tomi
and this?  (BTW, is this considered triple posting even for posting multiple pictures?)

Parallel.

[Tomi]

Well duh, there just fun to look at and think why it looks unparallel at first.

[GaryCXJk]

Originally posted by Ace of Spades
Actually, KM. The question is supposed to be, which letter is darker. A or B? And the answer is, (taken out because we know giving away the answer is cool, right?).

The letter B is obviously darker. Check the colours in a photo editing software.

http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html