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(1) Incident ray, normal nd refrected ray lies at the same point
(2)sinI/sinR
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Answer:
the principal that for a ray ,radar pulse ,or the like ,that is incident on the interface of two media,the ratio of the since of the angle of incidence to the since of the angle of Refraction is equal to the ratio of the velocity of the ray in the first medium to the velocity in the second medium and the incident ray,.......
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