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A place electromagnetic wave `F_(s)=100 cos(6xx10^(8)t+4x) V//m` Propagates in a medium of dielectric constant. The refractive index is

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A place electromagnetic wave
`F_(s)=100 cos(6xx10^(8)t+4x) V//m`
Propagates in a medium of dielectric constant. The refractive index is
A. `1.5`
B. `2.0`
C. `2.4`
D. `4.0`
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Correct Answer - B
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