Christmas candy cane optical illusion?

No, we didn't slice this candy cane in half. Instead we put it in a glass filled with a layer of water and a layer of oil. Since each medium (water, oil, and air) slows down light a little bit differently, the light bends a little bit where the air meets the oil, and where the oil meets the water. The result? A candy cane that looks chainsawed into segments.

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