See colors that aren't really there.
A clueless way to determine the size of an object.
A face seen upside down may hold some surprises.
You can see the spring, but you can't touch it.
This visual illusion makes the palm of your hand appear to squirm and twist.
Motion helps you see things you might miss otherwise.
Without a boundary, it's hard to distinguish different shades of gray.
A lens creates an image that hangs in midair.
What you see is often affected by what you expect to see.
It's all done with mirrors.
Now you see it; now you don't. An object without a sharp edge can fade from your view.
It's all done with mirrors!
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© 2015 Exploratorium
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