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

The ratio of the rate of irradiate in a vacuum come its rate in a specific medium is referred to as refractive index. Refractive index is also referred to as refraction table of contents or index of refraction. The rate of irradiate in a medium depends top top the properties of the medium. In electromagnetic waves, the rate is dependent on the optical thickness of the medium.

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