write a relationship between angle of incidence and angle of refraction for a give pair of media?
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(i) The ratio of the sine of angle of incidence 'i' to the sine of angle of refraction 'r' is constant for the given pair of media. This constant is called the refractive index.
μ=
sinr
sini
(ii) It occurs due to change in speed of light as it enters from one medium to other medium having different optical density.
(iii) When a ray of light is incident normally on the surface of second medium, it passes undeviated.
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