The stick looks straight underwater.
The stick looks straight aboveground.
The stick looks bent when halfway in,
But at least it doesn’t look round.
Some say our eyes deceive us.
But they’re doing the best that they can!
You have other ways to test if it’s bent,
Like grabbing the stick with your hand!
And after sufficient testing
And vigorous interaction
You may begin to understand
Something about refraction.
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