Introduction to Refraction

The video explains refraction, a phenomenon where light changes direction and speed when passing through different media. It describes how this causes illusions, like the straw appearing broken in water. The video covers phase velocity, the index of refraction, and how density affects light bending. It also explains how different colors of light refract at different angles, leading to a spectrum when passing through a prism.

What new insight or understanding did you gain from this video?

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