A plane electromagnetic wave Ez=100 cos6×108t+4xV/m propagates in a medium of dielectric constant
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a
1.5
b
2.0
c
2.4
d
4.0
answer is B.
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Detailed Solution
Comparing the given equation with equation of plane electromagnetic wave,Ez=E0cosωt+kx, we haveω=6×10-8 and k=4Velocity of light in mediumv=ωk=6×1084=32×108m/sRefractive index, μ=cv=3×1083/2×108=2