If denotes a unit vector along an incident ray a unit vector along the refracted ray into a medium of refractive index u and a

Question

If denotes a unit vector along an incident ray a unit vector along the refracted ray into a medium of refractive index u and a unit vector normal to the boundary of the media directed towards the incident medium then the law of refraction can be written as 11 1 n rn 2 x xr 4 x rxn 3 x rxn

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