# When the angle of incidence on a material is 60^(@), the reflected light is completely polarised. The velocity of the refracted ray inside the mater

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When the angle of incidence on a material is 60^(@), the reflected light is completely polarised. The velocity of the refracted ray inside the materials is (in m//sec^(-1))
A. 3xx10^(8)
B. (3/sqrt(2))xx10^(8)
C. sqrt(3)xx10^(8)
D. 0.5xx10^(8)

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mu=tan 60^(@)=sqrt(3)
v=c/mu=(3xx10^(8))/sqrt(3)=sqrt(3)xx10^(8) m//sec