❥define refraction of light and its laws
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The Refraction of light is the change in direction (bending of light rays) when it passes from one optically transparent medium to another. First law of refraction states that the incident ray, the refracted ray and the normal to the interface all lie in the same plane.
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The phenomenon of change in the direction of light when it passes from one transparent medium to another is called refraction. Laws of refraction: (i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.
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