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If the angle of incidence is i and that ...

If the angle of incidence is `i` and that of refraction is `r`. Then the speed of light in the medium to which the light is refracted from air is :

A

`v=c (sinr)/(sin i)`

B

`v=c (sini)/(sin r)`

C

`v=c (sini)/(cos r)`

D

`v=c(cos r)/(cos i)`.

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