Question

Define Snell's law???​

Answer 1

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a law stating that the ratio of the sines of the angles of incidence and refraction of a wave are constant when it passes between two given media.

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Answer 2

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✌Snell's law states that the ratio of the sines of the angles of incidence and refraction is equivalent to the ratio of phase velocities in the two media, or equivalent to the reciprocal of the ratio of the indices of refraction:

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