Q.

A plane electromagnetic wave is propagating in a transparent medium having relative permeability 1.6 and relative permittivity 1.8, Then refractive index of the medium is

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answer is 3.

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Detailed Solution

Velocity of propagation of electromagnetic wave in the medium,v=1μεVelocity of light in vaccum,  c=1μ0ε0∴  Refractive index cv=μμ0×εε0=μrεr=1.6×1.8=2.88≃1.7
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