# Bent Pencil

Contributor: Stas Fainer

This is a simulation of the image perceived with our eyes, when looking from above on a partially submerged pencil in a glass of water. The discontinuity of the refractive index between air and water causes the pencil to appear both broken and bent. However, in this simulation, the bending is more pronounced. You can check the Broken Pencil simulation where the breaking of the pencil is more pronounced.

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