Physics, asked by dussajagadiswar, 11 months ago

Why doesn't a light ray incident along the normal deviate? ​

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Answered by Madhu8486
1

Answer:

Thus, for normal incidence the light does not deviate. In fact we define refraction by change of speed of light at the interface between two transparent media. ... The tangential surface to these wavelets is again a plane parallel to interface .This gives rays normal to the interface. Thus, no deviation .

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