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Here is a great demonstration of the size illusion caused by perspective:
It is related to the Moon illusion, as demonstrated by the animated diagram on this page:
Why does the moon look so much bigger when it is near the horizon
The illusion has practical effects – it is something that architects think about in large structures, going all the way back to the Parthenon:
More info on the Parthenon (and the source of that video clip) can be found here.
See also the demonstration on this page: Müller-Lyer Illusion
More cool optical illusions:
- Bizarre optical illusion – 200 tiny squares bend a checkerboard
- Amazing Animated Optical Illusions – Plus, how to make your own
- Three great optical illusions on video
- A great optical illusion – the diamonds that change colors
- Today’s optical illusion is brought to you by the color Yellow
- Two optical illusions for your viewing pleasure
- A most impressive optical illusion
- Seven great optical illusions
- the perception of images
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