What is meant by refraction
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Amar Kumar 8 years, 4 months ago
Refraction is the change in direction of a wave passing from one medium to another caused by its change in speed. For example waves in deep water travel faster than in shallow.
Refraction is described by Snell's law, which states that, for a given pair of media and a wave with a single frequency, the ratio of the sines of the angle of incidence θ1 and angle of refraction θ2 is equivalent to the ratio of phase velocities (v1 / v2) in the two media, or equivalently, to the opposite ratio of the indices of refraction (n2 / n1).
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