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A plane electromagnetic wave
$E_{z} = 100 \cos (6 \times 10^{8} t + 4 x) V / m$
propagates in a medium of dielectric constant. The refractive index of the medium is

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Correct option is B

Comparing the given equation with equation of plane electromagnetic wave, Ez = E0 cos (ωt + kx) we have ω = 6 × 10−8 and k = 4Velocity of light in mediumv=ωk=6×1084=32×108m/sRefractive index, μ = cv=3 × 108(3/2) × 108=2

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A plane electromagnetic waveEz = 100 cos 6 × 108 t + 4x V/mpropagates in a medium of dielectric constant. The refractive index of the medium is

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Ready to Test Your Skills?

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A plane electromagnetic wave
$E_{z} = 100 \cos (6 \times 10^{8} t + 4 x) V / m$
propagates in a medium of dielectric constant. The refractive index of the medium is