Refraction is the adjust in the direction that a tide passing from one tool to another. A light ray refracts whenever it travel at one angle right into a tool of various refractive index. This readjust in speed outcomes in a adjust in direction.

The ratio of the speed of light in a vacuum to its speed in a details medium is referred to as refractive index. Refractive index is likewise referred to together refraction index or index of refraction. The speed of light in a medium depends on the properties of the medium. In electromagnetic waves, the speed is dependency on the optical thickness of the medium.

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