At first, there doesn't seem anything unusual about this picture. I mean, it's just a bunch of diagonal lines and a slightly distorted square in the middle - right? Wrong.Believe it or not, the 4 lines that make up the square are actually perfectly straight. In fact it /is/ a perfect square. For proof of this, the animation will swap between the two frames so you can see the square remains the same. Also check by loading the pic into your favourite art package.
 Rotating dot whirlpool Wow! Try staring at this for more than 5 seconds without going crazy. Then try following it round! =) Curves constantly die out and then re-evolve as part of another curve. |
Tri-curve
Each of the 3 curves shown below are sections of the circle.Which would form the largest circle though?
(Answer at the bottom of the page.)
Skewed lines
All these tracks look as though they've come from a broken down railway track, but in actual fact, they are perfectly parallel! To prove they really are parallel, watch the small 'hairs' gradually disappear. You will see the lines as how you would expect them to be.
Primrose's field (right)for more optical illusions in this style.
|
 |
What does this simple green signpost say?
Guess again.
Look at the bottom of
the page for the answer.
Guess again.
Look at the bottom of
the page for the answer.
Multi CubeNow this is clever, even for those who think they know what's going on here. Take a look at the diagram - how many cubes can you see? You can give 1 or 2 answers, but you are not allowed to count 'overlapping' cubes as part of any one total. As soon as you think you know the answer/s, click the picture for the full optical illusion and be amazed. |
Which semicircle is brighter - the left or the right half?
