Snell's Law Example 1. Created by Sal Khan.
Watch the next lesson: https://www.khanacademy.org/science/physics/geometric-optics/reflection-refraction/v/snell-s-law-example-2?utm_source=YTutm_medium=Descutm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/geometric-optics/reflection-refraction/v/refraction-in-water?utm_source=YTutm_medium=Descutm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world
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