Tuesday, 2 June 2009

A most amazing optical illusion

Look directly at the falling ball and it falls straight down.

Look off to one side and it falls to the left.

You don't believe me do you? See it here.


yorksnbeans said...

very interesting.....

RBH said...

To make it weirder, look directly at the ball from fairly close with crossed eyes. I see two balls falling in parallel, and as my eyes uncross while the ball(s) is(are) falling they shift to intersecting paths.

Andy Holroyd said...

RBH you've made my eyes ache, but you're right.

Just as weird, if you make the speed positive 12 it drifts to the right! (must be an effect of the simulated rotation)

Or speed it up to +/- 50, then it almost appears to be moving horizontal.

And it's the same if you close one eye.


NobblySan said...


Cheaper than buying lots of beer, but not as much fun.

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