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If i^ denotes a unit vector along incident light ray, r^ a unit vector along refracted ray into a medium of refractive index μ and n^ unit vector normal to boundary of medium directed towards incident medium, then law of refraction is

a
i^.n^=μr^.n^
b
i^×n^=μn^×r^
c
i^×n^=μr^×n^
d
μi^×n^=r^×n^

detailed solution

Correct option is C

Snell's law in vector form is =i^×n^=μr^×n^

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